Mathematics High School

The set of life spans of an appliance is normally distributed with a mean Mu = 48 months and a standard deviation Sigma = 8 months. What is the z-score of an appliance that stopped working at 64 months?

Group of answer choices

-2

-1

2

1

Answers

Answer 1

Answer:

D.2

Step-by-step explanation:

Answer 2

The z-score of an appliance that stopped working at 64 months is 2

What is z score?

Standard score or z score in statistics is defined as the number of standard deviations by which that the value of a score is above or below the mean value.

The formula to find the z score of a data is,

z = (x - μ) / σ

Here x is the observed value, μ is the mean and σ is the standard deviation.

Given that,

Mean = 48 months

Standard deviation = 8 months

x = 64 months

Substituting in the formula,

z = (64 - 48) / 8 = 2

Hence the z score of the appliance is 2.

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Related Questions

The volume of a sphere is 267.95 m2. To the nearest meter, what is the radius of the sphere? Use
3.14 for .
I need this answer ASAP!

Answers

Answer:

4m

Step-by-step explanation:

v=4/3 pi r^3substitute 267.95=4/3×3.14×r^3267.95= 12.56r^3/3multiply by the reciprocal on both sides 64=r^3find the cuberoot on both sides to remove the cube hence 4=r

Someone please answer this question quick

Answers

Answer:

The first graph

Step-by-step explanation:

The function shows a 4x-2 relationship so to test if the relationship works you multiply a number by 4 and subtract 2, if it follows this then it represents h but if it doesn't then it is incorrect. The first graph is the only answer choice that follows this function so it is the correct answer.

Find volume. Round to nearest tenth

Answers

Answer:

346.41 i hope this helps and i got a question for you what does brainliest mean?

Step-by-step explanation:

AC is a diameter of D. If m BDC = 150°, what is the measure of AB?

I'm sorry if this doesnt make sense. ​

Answers

Correct answer is 30 °

in my opinion 180° is the answer

hope helps

If a particular type of brick weighs 30 lb. per cubic foot, how much will a stack of bricks 4 ft. by 7 ft. by 8 ft. weigh?

Answers

Answer:

6720 lbs

Step-by-step explanation:

guessing

4 × 7 × 8 = 224 cubic feet

224 x 30 = 6720

What is the value of this expression when a= 3 and b- -2? (3a^-2 b^6)/(2a^-1 b^5)^2

No links please. Will give Brainlest on who is right. (This gamer girl is bad at math uwu)

Answers

Answer:

1

Step-by-step explanation:

Austin drove 140 miles in two hours what was his average speed

Answers

Answer:

70 mph

Step-by-step explanation:

(140 miles) / (2 hours) = 70 mph

What is the value of log4 2?​

Answers

Answer:

1/2

Step-by-step explanation:

type it into the calculator

The value of logarithm log base 4(2 is 1/2.

What is Logarithm?

The logarithm is exponentiation's opposite function in mathematics. This indicates that the exponent to which b must be raised in order to obtain a number x is the logarithm of x to the base b.

Given:

Rewrite as an equation.

log base 4(2)=x

and, Rewrite log base 4(2)=x in exponential form using the definition of a logarithm. If x and b  are positive real then

log (base b) x= y equivalent to [tex]b^y[/tex] = x

Create expressions in the equation that all have equal bases.

log base 4(2)=x

[tex](2^2)^x[/tex] = 2

Since the bases are the same, then two expressions are only equal if the exponents are also equal.

2x = 1

x= 1/2.

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Please help need this answer

Answers

Answer:

Step-by-step explanation:

The next (best) step is to divide everything by a.

D is not correct because only bx is divided by a. You cannot neglect to divide -c by a

B will eventually be done in some form but it is much easier to deal with division by a. The way b is done is not correct.

A is completely wrong. It's far to soon to be dealing with square roots.

can some help me its number 2

Answers

W: (5,9)

X: (7,8)

Y: (9,2)

Z: (2,5)

hope this helps! tell me if i got anything wrong!

Find the volume of the solid.
Need correct answer with explanation( brainlest)

Answers

Answer:

41.6 yd³

Step-by-step explanation:

Volume = lwh

Volume = (2 yd)(4 yd )(5.2 yd) = 41.6 yd³

Landon reads for 45 minutes 5 times a week. Marisa reads for 100 minutes 3 times a week. Daniel reads for 25 minutes 7 times a week. Out of the three students who reads the most per week? What is the difference between the person who reads the most and the person who reads the least?

Answers

Answer:

Marisa

Step-by-step explanation:

Find the circumference of the circle. Use 3.14 for the value of ", Round your answer to the nearest tenth.

Answers

The formula for circumference is 2*pi*r
We plug in these values and get 2*pi*2.9
Or 18.2 in

Answer:

18.2 cm

Step-by-step explanation:

Given,

Radius of the circle = 2.9 in.

Therefore,

Circumference of the circle

[tex] = 2\pi r[/tex]

[tex] = 2 \times 3.14 \times 2.9 \: cm[/tex]

= 18.212 cm

As,

It has asked for nearest tenth so it will be,

18.212 cm

Since, there is 1 in the hundredth digit so it will round to 0.

Hence,

18.2 cm is the required circumference of the circle rounded to nearest tenth. (Ans)

-2.5f+ 0.8f-16 -3 help please

Answers

equals to -1.7f - 19

What is the probability a customer ordered a small, given that he or she ordered a hot drink?

Answers

The answer is 5
All of them are 100
5 are hot

Answer:

7% is the answer

Step-by-step explanation:

someone help me right now please!! “15% of what number is 14?”
i need step by steps i dont know how to solve these problems

Answers

Answer:

We have, 14% × x = 15

or, 14100 × x = 15

Multiplying both sides by 100 and dividing both sides by 14,

we have x = 15 × 10014

x = 107.14

If you are using a calculator, simply enter 15×100÷14, which will give you the answer.

Question 5 (2 points)
(15.01 LC)
Follow the rules to create two number sequences that go to the fifth term each.
Rule 1: Multiply by 2 starting at 10. Rule 2: Subtract 4 starting from 24. What is the first term that appears in both sequences? (2 points)
a10
b14
C20
d26

Answers

Answer:

Step-by-step explanation:

C

rule 1 pattern: 10, 20, 40, 80, etc.

rule 2 pattern:24,20,16,12,etc.

20 is in both patterns (:

Answer:

C

Step-by-step explanation:

Kevin has at most $30 to spend at the fair. The entrance fee is $5.50 and each activity is $1.25.
Write the equation that represents the problem.

Answers

Given:

Entrance fee = $5.50

Additional fee =  $1.25 for each activity.

Total amount spend at fair = $30

To find:

The equation that represents the problem.

Solution:

Let the number of activities be [tex]x[/tex].

Additional fee for 1 activity = [tex]\$1.25[/tex]

Additional fee for x activity = [tex]\$1.25x[/tex]

Total fee = Entrance fee + Additional fee for x activity

               = [tex]\$5.50 + \$1.25x[/tex]

It is given that Kevin has at most $30 to spend at the fair. So, total fee must be equal to $30.

[tex]\$5.50 + \$1.25x=\$30[/tex]

[tex]5.50+1.25x=30[/tex]

Therefore, the require equation is [tex]5.50+1.25x=30[/tex].

Note: The inequality for the given problem is [tex]5.50+1.25x\leq 30[/tex].

Benson spent 5/6 of an hour reading on each of three days this week. How long did Benson spent reading this week?

Answers

Answer: You want to know how many hours he was reading per week. 5/6 * 3 = 15/6 Hours = 5/2 Hours = 2 Hours 30 minutes.

150 minutes

Step-by-step explanation:

5/6 = 50/60. 60 min in an hour. so 5/6 would mean 50 min of 60. he spent 50 minutes each day reading. now since it says 3 days, youd multiply that by 3. ultimately, youd get 150 min in total.

A sculptor plans to ship the pyramid shown in one of three boxes. The interior of the pyramid holds 4,500 cm3 of water. The base is an isosceles trapezoid. Into which boxes will the pyramid fit? Drag “yes” or “no” to each box height.

Answers

Answer:

28 cm and 32 cm

Step-by-step explanation:

Volume of the pyramid:

V = 1/3Bh

Find base area:

B = 1/2(20 + 30)*20 = 500 cm²

Substitute value of the volume and find the height of the pyramid:

4500 = 1/3*500*hh = 4500*3/500h = 27 cm

The boxes with h > 27 can fit the pyramid:

28 cm and 32 cm

Area of base

1/2(30+20)(20)10(50)500cm²

Volume=1/3Area×Height

Height

4500(3)(500)27cm

So answers are

boxes of 28cm and 32cn

Helpppppp me please I do anything!!!!

Answers

Answer:

Step-by-step explanation:

Your answer should be a because the negatives cancel out making them positive.

Answer:

i beleive its A

Step-by-step explanation:

if im wrong its D and i can i has brainliest

Save
Submit
Kayla gave of a pan of brownies to Ella and of the pan to Eli. Which choice is the MOST reasonable for the part of the
pan of brownies Kayla gave away?
6
A
B)
D
E
The
N.

Answers

Answer:

its definetly 1/2 but i cant see the numbers but i had this question like 2 minutes ago

Step-by-step explanation:

nice to help a high schooler, make you think how hard high school will be

coefficient of 3+4x-7

Answers

-4(1-x) I think that’s the correct answer

Please answer

3x+5x-5x

Answers

Answer:

3x

Step-by-step explanation:

Combine Like Terms:

=3x+5x+−5x

=(3x+5x+−5x)

=3x

Hope it helps :)

Answer:

=3x

Step-by-step explanation:

cancel out 5x-5x, which leaves you with 3x.

i hope this helps :)


if you’re standing on the street 1,300 feet from the bottom of the building, you have to look up at a 23 degree angle to see the top. How tall is the building ? explain or show your reasoning.

Answers

Answer:

551.82feet tall

Step-by-step explanation:

WE are given the following from the question;

Distance of me from the bottom of the building = 1300feet (adjacent)

Angle of elevation = 23 degrees

Required

Height (opposite)

Using the SOH CAH TOA identity

Tan theta = opp/adj

Tan 23 = H/1300

H = 1300tan23

H = 1300(0.4245)

H = 551.82feet

Hence the building is 551.82feet tall


What are the x-intercepts of the graph of the function
f(x) = x2 + 4x – 12?

Answers

The x-intercepts are: (x-2) & (x+6)

Answer:

The x-intercepts of the graph would be (2, -6)

Step-by-step explanation:

Hope it was helpful ^____^ !

The cereal box shown below is a rectangular prism​

Answers

Answer:

Lenghth x width x hight

Step-by-step explanation:

MULTIPLY LENGNTH TIMES WIDTH TIMES HIGHT TO GET YOUR FINAL PRODUCT

Length x width x height
15 x 4 x 25
1,500cm^2

Find the mean absolute deviation (MAD) of the data in the pictograph below.
baskets
2 baskets
Baskets each student made
DO
DO
Baskets made
Reynaldo
Marcelle
Allie
Fernando

Answers

Answer:

10.5

Step-by-step explanation:

6,9,12,159,12 are both tired for the median.9+12/2 = 10.5

Answer:

10.5

Step-by-step explanation:

did it on khan

Altogether how many legs do 30 cows have

Option 1 = 90

Option 2 = 60

Option 3= 120

Answers

Answer:

A cow possess 4 legs.

So, 30 of them will have 4 × 30= 120 legs

Option 3

Answer:

'Hope it helps uh! Kindly mark it as the brainliest and thank!!

(•‿•)

Step-by-step explanation:

If 1 cow has 4 legs, then how many legs will 30 cows have?

Simple answer!

We will multiply 4 with 30 (as 4 legs for each of the 30 cows)

4 x 30

= 120

∴ Option 3 is the correct answer.

I hope you understand!

Given the polygon containing Point P.




Point P is rotated 90° about the origin. Its image is


(4, -4)

(-4, 4)

(-4, -4)

(4, 4)

Answers

I think it is B. (-4, 4)
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