Ian owns a small business selling used books. He knows that in the last week 122 customers paid cash, 14 customers used a debit card, and 4 customers used a credit card.

Answers

Answer 1

The number of customer you expect to pay with a credit card will be 51 customers.

How to find that a given condition can be modeled by binomial distribution?

Binomial distributions consist of n independent Bernoulli trials.

The expected value will be

E(X) = np

Ian owns a small business selling used books.

He knows that in the last week 122 customers paid cash, 14 customers used a debit card, and 4 customers used a credit card.

If next week, he is expecting 1800 customers.

Then the number of the customer you expect to pay with a credit card will be

n = 1800

The probability of the customer who pays with a credit card will be

p = 4/140

p = 0.02587

Then the expected value will be

E(x) = 1800 x 0.02587

E(x) = 51.42

E(x) ≅ 51

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Related Questions

A principal of $2000 is invested at 7.75% interest, compounded annually. How much will the investment be worth after 14 years?
Use the calculator provided and round your answer to the nearest dollar.

Answers

Answer:

Yearly compounding: 7.75% $5,686.85

Quarterly compounding: 7.978% $5,857.78

Monthly compounding: 8.031% $5,898.27

Daily compounding: 8.057% $5,918.20

Step-by-step explanation:

multiply yearly by 14

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Answers

Answer:

y = 113

Step-by-step explanation:

Two adjacent angles of a parallelogram are always supplementary.

Some pedometers have a default setting that assumes that the number of steps a person must take to walk 1 mile decreases by 33 steps per 1 inch increase in height. Suppose a person 72 inches tall makes 2,250 steps per mile.

A. Find a linear model of the number of steps S per mile as a function of height h (in inches).
S = ______

B. Use the model to predict the number of steps per mile a person who is 68 inches tall will take.

Answers

The number of steps per mile for a person who is 64 inches tall will be 2354.

What is Algebra?

Algebra is the study of mathematical symbols, and the rule is the manipulation of those symbols.

Some pedometers have a default setting that assumes that the number of steps a person must take to walk 1-mile decreases by 33 steps per 1-inch increase in height.

Suppose a person 72 inches tall makes 2,250 steps per mile.

70 inches tall makes 2150 steps per 1 mile.

For every inch of height gain, the count of steps required to walk a mile drops by 34.

If the count of steps is S and the height is h, we have the following issue.

S = 2150 - 34(h -70)

Therefore the linear model will be

S = 2150 -34(h - 70)

Now for h = 64, we have

S = 2150 - 34(64 - 70)

S = 2150 - 34 ( -6)

S = 2150 + 204

S = 2354

The number of steps per mile for a person who is 64 inches tall will be 2354.

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In a quadrilateral mnpq, <M=48°,<N =80° and P is three times than <Q. Find<P. ​

Answers

Answer:

[tex] \boxed{ \rm\angle P = \tt174{ {}^ \circ} }[/tex]

Step-by-step explanation:

Given,

∠M=48°∠N = 80°∠P = Three Times more than ∠Q.

In a quadrilateral.

To Find:

∠P

Solution:

We know that in quadrilateral MNPQ,

[tex] \rm \: \boxed{ \rm ∠M +∠ N +∠ P+ ∠Q = 360 ^{ \circ}}[/tex]

[tex] \rm \implies \: 48 {}^ \circ + 80 {}^ \circ + \angle P + \cfrac{1}{3} \angle \: P = 360 {}^{\circ}[/tex]

[tex] \rm \implies \angle P + \cfrac{1}{3}\angle P = 360 { {}^ \circ} - 48{ {}^ \circ} - 80 {{}^ \circ} [/tex]

[tex] \implies \rm \: \cfrac{4}{3} \angle P = 232 {{}^ \circ} [/tex]

[tex] \rm \: \implies \: \angle P = 232 {}^{\circ} \times \cfrac{3}{4} [/tex]

[tex] \rm \implies \: \angle P = 174{ {}^ \circ} [/tex]

Thus, ∠P will be 174° .

solve for x 8 (x-1) = -4x + 136

Answers

Answer:x=12

Step-by-step explanation:
8(x-1)=-4x+136
8x-8=-4x+136
8x+4x=136+8
12x=144
X=144:12
X=12
Hope its help u thanks

l need the answer for this question asap!!!

Answers

Answer:A. Domain

The domain of a function is the x-values that the graph applies to. This means that the domain is whatever x-values the graph crosses. All vertical parabolas (like the one pictured) have a domain of all reals. This is because any x-value could be plugged into the function and provide a y-value. while it may not seem like it, that graph will cover every single x-value in existence.

Domain = All reals

B. Range

The range is similar to the domain but is for y-values. So, the range is whatever y-values the graph applies to and crosses. As you can see from the graph, there are no y-values above 1. This means the range is y≤1.

Range = y ≤ 1

C. Increasing Interval

A graph is increasing when the y-values are increasing. So, on the parent function of a parabola, the graph increases to the right and decreases to the left. However, this graph is inverted and shifted to the left, so the interval will also be flipped and shifted. In this case, the graph increases from -∞ to 2.

Increasing Interval = [-∞, 2]

D. Decreasing Interval

The decreasing interval is very similar to the increasing interval. This interval applies when the y-values are decreasing as the x-values increase. For a parabola, the increasing and decreasing intervals always meet at the x-value of the vertex, which is 2 on this graph. The y-values decrease during the interval 2 to ∞.

Decreasing Interval = [2, ∞]

E. Opening

The direction of a parabola is decided by the sign (+ or -) of the leading coefficient. Positive coefficients open up and negative opens down. As you can see from the graph, the sides of the parabola point downwards. This means that the leading coefficient must be negative.

Opening = Down

F. Min and Max

A parabola will always only have a min or a max, never both. If a graph opens up it has a min because there is one y-value which is the minimum possible y-value. Graphs that open downwards have a maximum because there is one y-value that is the largest possible. So, this graph has a maximum of 1 because that is the largest possible y-value.

Max = 1

identify an equation in slope-intercept form for the line parallel to y=1/4x-7 that passes through (-2,-6)

Answers

Answer:

D. [tex]y + 6 =- \frac{1}{4} (x+2)[/tex]

Step-by-step explanation:

We are given that a line is parallel to the line y=-1/4x-7 and passes through (-2, -6).

We want to write the equation of this line.

First, we need to know that parallel lines have the same slope.

In y=-1/4x-7, the slope of the line is -1/4; it is also the slope of the line parallel to it.

All of the answers in your system are written in point-slope form, which is [tex]y-y_1=m(x-x_1)[/tex], where m is the slope and [tex](x_1, y_1)[/tex] is a point

As we already know the slope and the point, we can plug these values into the formula.

Starting with the slope; as found above, the slope is -1/4. Therefore, the equation will then be:

[tex]y-y_1=-\frac{1}{4} (x-x_1)[/tex]

Now substitute -2 and -6 as [tex]x_1[/tex] and [tex]y_1[/tex] respectively (note: we have NEGATIVE numbers, and SUBTRACTION in the formula, so we will end up subtracting a negative).

[tex]y--6=-\frac{1}{4} (x--2)[/tex]

We can simplify this to become:

[tex]y+6=-\frac{1}{4} (x+2)[/tex]

Therefore, D is the answer.

Answer:

y+6= -4(x+2)

Step-by-step explanation:

Volume with fractions is confusing. ​

Answers

Answer:

V≈0.064

Tip:

just to help you for future note with finding volume with fractions is you use a calculator and do the top divided by the bottom and it should give you a decimal

The plane region is revolved completely about the​ x-axis to sweep out a solid of revolution. Describe the solid AND find its volume in terms of π.

Answers

Answer:

C

Step-by-step explanation:

what happens, when you rotate something around a pole ? what shape is the most outside point making around that pole ?

a circle, of course.

that means rotating the rectangle around the x-axis creates a round object (with the bottom area being a circle).

so, all answers about a prism (rectangular bottom shape) are automatically wrong.

again, just imagine to rotate a small sheet of paper around a pole (the x-axis acts like one in this scenario).

the result is a solid with a circular bottom area, and it maintains this shape all the way to the top.

it is a cylinder !

and what is its radius ?

well, the outermost point of the rectangle is 8 points away from the x-axis. when we rotate this rectangle, that attribute remains, of course. and every point on the side surface of the resulting cylinder has the same distance from the central x-axis : 8.

so, the radius is 8.

and the volume of a cylinder is

ground area × height = pi×r² × height

in our case

pi×8² × 5 (the width or "height" of the rectangle) = pi×64 × 5 = 320×pi


When you half a whole number that ends in 6, you always get a number
ends in 3."

Answers

Answer:

This actually is false, it doesn't always work.

Step-by-step explanation:

Such as,

256 x 1/2 =

128.

The last digit isn't a 3, it's an 8.

Another Example,

176 x 1/2 =

88.

The last digit is also an 8 here, and not a 3.

It does work for some equations, but not for most of them, hope this helps!

Work out 15% of £24 please

Answers

Answer:

£3.6

Step-by-step explanation:

24 = 100% ; x = 15%

Let's make it simple

[tex]\frac{x}{24 } = \frac{15}{100} ; x = 24.15/ 100 ; x=3.6[/tex]

PLS HELP !!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

0.029, 0.23, 25%, 0.66, 2/3

Solve for the value of x

Answers

Answer:

x = 7

Step-by-step explanation:

I've attached my work

- im yellow is what the name of the angle is

   - in green is what to do with it

- In blue is me checking my work by plugging x back in

Please give me feedback on my repsomse by commenting,

any way i can improve showing my work?

Hope it helps, let me know if you have questions !

Have a nice rest of your day :)

I want to know the formula of logarithm

Answers

Answer:

\log_{b}({b^x})=x

Step-by-step explanation:

hope this helps

I need help please I don’t know how to solve this

Answers

Answer:

68 ft^2

Step-by-step explanation:

The shaded region is a square missing a triangle. Thus, the area of the shaded region = area of square - area of triangle

Thus, we get 8*9 - 1/2 * 2 * 4 = 72 - 4 = 68 square feet.




m Enter the number that belongs in
the green box

Answers

Answer:

m<C = 180 - (90+32)

= 180 - 122

= 58°

Jackie runs and dances for a total of 55 minutes every day. She dances for 25 minutes longer than she runs. Part A: Write a pair of linear equations to show the relationship between the number of minutes Jackie runs (x) and the number of minutes she dances (y) every day. (5 points) Part B: How much time does Jackie spend running every day? Show your work. (3 points) Part C: Is it possible for Jackie to have spent 45 minutes dancing if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs? Explain your reasoning. (2 points)

Answers

It is not possible for Jackie to have spent 45 minutes dancing if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs.

System of equations

These are equations that is made of unknown variables.

Let the time she dances be x

Let the time she runs be y

If Jackie runs and dances for a total of 55 minutes every day, the;

x + y = 55 ............ 1

If She dances for 25 minutes longer than she runs, then;

x = y + 25 ............. 2

The pair of equation are x + y = 55 and x = y + 25

Substitute 2 into 1

y + 25 + y= 55

2y .= 30

y = 15

He spent 15 minutes running everyday

x = 55 - 15

x= 40minutes

It is not possible for Jackie to have spent 45 minutes dancing if she runs and dances for a total of exactly 55 minutes and dances for 25 minutes longer than she runs.

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Answer:

a:x+y=55

x=y-25

b: x = 15 minutes

c: No

Step-by-step explanation:

Part A: x=y-25

x+y=55

Part B:if x-y=-25 / x+y=55

2x=30

x=15 minutes she runs.

Part C:No because 45 + 25 = 70 and 70+45 = 115 and 115>55

Determine the solution set for x.
X + 300 < 450

Answers

The solution set for the inequality X + 300 < 450 is X∈ (-∞, 150) when X is less than 150.

What is inequality?

It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than, known as inequality.

We have inequality:

X + 300 < 450

X <  450 - 300   (subtract 300 on both sides)

X <  150

X ∈ (-∞, 150)

Thus, the solution set for the inequality X + 300 < 450 is X∈ (-∞, 150) when X is less than 150.

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What’s the answer?????

Answers

the answer will be narrow

Where is the works cited page found when writing an essay?
A. In the beginning
B. In the middle
C. After each citation
D. At the end

Answers

D at the end that’s how I learned it

THIS IS GEOMETRY AND I NEED IMMEDIATE HELP W THIS PROBLEM PLEASE HELP

Answers

Step-by-step explanation:

ang acb of arc amb= 130°

ang acb of arc apb = 230°

length of arc = 5*230/360 = 3.19 cm

What are the slope and y-intercept in the equation y = 7 + 5x + 2x + 4?

Answers

Answer: slope is 7 and y-intercept is 11

Step-by-step explanation:

y = 7 + 5x + 2x + 4

combine like terms

y = 11 + 7x

rearange

y = 7x + 11

slope is 7 and y-intercept is 11

     [tex]\rule{50}{1}\large\blue\textsf{\textbf{\underline{Question:-}}}\rule{50}{1}[/tex]

       What is the slope of the line y=7+5x+2x+4? What about the y-intercept?

 

     [tex]\rule{50}{1}\large\blue\textsf{\textbf{\underline{Answer and how to solve:-}}}\rule{50}{1}[/tex]

     First, we need to combine like terms:-

                [tex]\Large\text{y=7+4+5x+2x}[/tex]

[tex]\bigstar[/tex] On simplification,

              [tex]\Large\text{y=11+7x}[/tex]

[tex]\bigstar[/tex] We can rearrange the terms a little:-

                        [tex]\Large\textit{y=7x+11}[/tex]

Now we can easily determine the slope and the y-intercept of the line.

                    Slope = number multiplied by x

                     y-intercept = a number added to or subtracted from x

Henceforth, we conclude that

                [tex]\Large\text{Slope=7 \& y-intercept=11}[/tex]

Good luck with your studies.

#TogetherWeGoFar

       [tex]\rule{50}{1}\smile\smile\smile\smile\smile\smile\rule{50}{1}[/tex]

look at this diagram A: what fraction is shaded B:What Percentage Is Shaded 6/9 is shaded
its a triangle:)

Answers

Answer:

Fraction is 6 over 9 percentage is 0.54%

Hope This Helped

to
Integrate 4√x^5 directly

Answers

Answer:

here the answer ask if theres any prob

What is the slope of the line through -5,7 and -5,-8

Answers

Answer:

Undefined

Step-by-step explanation:

Answer:

[tex]slope = \frac{-15}{0}[/tex] = Undefined

Step-by-step explanation:

To find the slope of these two points we use the slope formula

[tex]slope = \frac{(y_{2} - y_{1})}{(x_{2}-x_{1})}[/tex]

[tex]slope = \frac{((-8) - 7)}{((-5)-(-5))}[/tex]

[tex]slope = \frac{-15}{0}[/tex]  The slope would be classified as undefined

PLS HELP MEEE I NEED TO TURN THIS IN

Answers

Answer:

150 laptops because 70% of the total devices are laptop computers and desktop computers so the remaining 30% of the devices are tablet. 500×0.30= 150.

Find −3/15÷1 3/4. Write your answer as a mixed number in simplest form.

Answers

step one: change the mixed number into an improper fraction:
1 = 4/4, so 1 3/4 = 4/4 + 3/4 = 7/4
step 2: realize that when we divide by a fraction, we are actually multiplying by the reciprocal, or the opposite of the fraction.
step 3: reciprocate the fraction
we are dividing by 7/4, so the reciprocal is 4/7.
step 4: multiply! to do this, you will just multiply across, meaning you will multiply the numerators together and the denominators together.
(-3/15) * (4/7) = -12/105
step 5: simplify
-12/105 is equal to -4/35
hope this helps!

help please I don't understand ​

Answers

Answer:

12 degrees hopefully its right it might be wrong tho if its im sorry at least i tried to help

Step-by-step explanation:

What are the solutions of the equation x squared equals 4? Use a graph of the related function.
A. A quadratic function is graphed on a coordinate plane. The parabola passes through the points left parenthesis negative 2 comma 0 right parenthesis, left parenthesis 0 comma negative 4 right parenthesis, and left parenthesis 2 comma 0 right parenthesis.

There are two solutions: negative 2and 2.
B. A quadratic function is graphed on a coordinate plane. The parabola passes through the points left parenthesis negative 2 comma 2 right parenthesis, left parenthesis 0 comma negative 2 right parenthesis, and left parenthesis 2 comma 2 right parenthesis.

There are two solutions: plus-or-minus StartRoot 2 EndRoot.
C. A quadratic function is graphed on a coordinate plane. The parabola passes through the points left parenthesis negative 2 comma 0 right parenthesis, left parenthesis 0 comma 4 right parenthesis, and left parenthesis 2 comma 0 right parenthesis.

There are two solutions: negative 2and 2.
D. A quadratic function is graphed on a coordinate plane. The parabola passes through the points left parenthesis negative 2 comma 8 right parenthesis, left parenthesis 0 comma 4 right parenthesis, and left parenthesis 2 comma 8 right parenthesis.

There are no real number solutions.

Answers

In the graph of quadratic equation, the parabola passes through the points left parenthesis (-2,0) right parenthesis, left parenthesis (0,-4) right parenthesis, and left parenthesis (2,0) right parenthesis.

What is a quadratic equation?

A quadratic equation is the equation in which the unknown variable is one and the highest power of the unknown variable is two.

The standard form of the quadratic equation is,

[tex]ax^2+bx+c=0[/tex]

Here,(a,b, c) is the real numbers and (x) is the variable.

The given quadratic equation is,

[tex]f(x)=x^2+4[/tex]

Equate the equation to zero to solve it further,

[tex]x^2=4\\x^2-4=0\\x^2=4\\x=\sqrt{4}\\x=\pm2[/tex]

Thus, the solution of the equation is +2 and -2. The graph of the equation is attached below.

Hence, in the graph of quadratic equation, the parabola passes through the points left parenthesis (-2,0) right parenthesis, left parenthesis (0,-4) right parenthesis, and left parenthesis (2,0) right parenthesis.

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Help please! (I’m not sure if the first is right.)

Answers

Answer:

Step-by-step explanation:

he can travel only with this gas 30×18=540 miles one way.

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