Please help with the thing i did not fill out yet! Khan course challenge

Answer:

2/300, or simplified: 1/150. Decimal: 0.006

Step-by-step explanation:

The first trigonometric expression cot x and sin x in terms of the second expression is one over tan x and one over cosec x.

Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.

Write the first trigonometric expression in terms of the second expression.

The cotangent can be written as

[tex]\cot x= \dfrac{1}{\tan x}[/tex]

And the sine can be written as

[tex]\sin x = \dfrac{1}{\csc x}[/tex]

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Answer:

c)  124.96

Step-by-step explanation:

Geometric series:  100 + 20 + ... + 0.16

First we need to find which term 0.16 is.

General form of a geometric sequence: [tex]a_n=ar^{n-1}[/tex]

(where a is the first term and r is the common ratio)

To find the common ratio r, divide one term by the previous term:

[tex]\implies r=\dfrac{a_2}{a_1}=\dfrac{20}{100}=0.2[/tex]

Therefore, [tex]a_n=100(0.2)^{n-1}[/tex]

Substitute [tex]a_n=0.16[/tex] into the equation and solve for n:

[tex]\implies 100(0.2)^{n-1}=0.16[/tex]

[tex]\implies (0.2)^{n-1}=0.0016[/tex]

[tex]\implies \ln(0.2)^{n-1}=\ln0.0016[/tex]

[tex]\implies (n-1)\ln(0.2)=\ln0.0016[/tex]

[tex]\implies n-1=\dfrac{\ln0.0016}{\ln(0.2)}[/tex]

[tex]\implies n=\dfrac{\ln0.0016}{\ln(0.2)}+1[/tex]

[tex]\implies n=5[/tex]

Therefore, we need to find the sum of the first 5 terms.

Sum of the first n terms of a geometric series:

[tex]S_n=\dfrac{a(1-r^n)}{1-r}[/tex]

Therefore, sum of the first 5 terms:

[tex]\implies S_5=\dfrac{100(1-0.2^5)}{1-0.2}[/tex]

[tex]\implies S_5=124.96[/tex]

Answer:

59.4

Step-by-step explanation:

Answer:

200.96 square feet

Step-by-step explanation:

SA = 2pi(r²) + 2pi(r)h

r = 2

pi = 3.14

h = 14

SA = 2(3.14)2² + 2(3.14)(2)14

SA = 6.28(4) + 6.28(2)14

SA = 25.12 + 175.84

SA = 200.96

Answer:

T is 5 and n is 10

Step-by-step explanation:

just relate the (b+Tv)^n with 3075072b^5v^10

Answer:

D

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

I answered so you could give other person brainliest lol, also it is correct just finished the test and got it right!

Answer:

1 out of 10 i think

Step-by-step explanation

2 sides of a coin + 5 days + 3 movements = 10 outcomes?

Answer:

B) addition property

Step-by-step explanation:

thinking that 3x - 30 - 0 should equal 0.

3x - 30 - 0 = 0

to get rid of numbers on side with variables, we have to add them to both sides (to make it 0 in side with variable.)

3x - 30 - 0 = 0

+30 +0 = +30 +0

3x = 30 <- step 4

Answer:

-6

Step-by-step explanation:

-15from both sides then divide the -24 from the left by 4 because you only need one x and your answer is x=-6

Answer:

Volume: 203,594

Surface Area: 105,237

----------------------------------------------------------------------------------------------------------

Let's start with surface area because it is a bit complex.

[tex]A = 5 ah + \frac{1}{2} \sqrt{5(5 + 2 \sqrt{5})}~a^2[/tex]

Now, we must break all of these factors into an equation.

remember, the height is 4, the base is 172

[tex]A = 5 * 172 * 4 + \frac{1}{2} * \sqrt{5 * (5 + 2 * \sqrt{5})} * 172^2[/tex]

[tex]A = \sf 1.05237 * 10^5 = 105,237[/tex]

So that should wrap things up for surface area, being 105,237

________________________________________________________

Now, we move on to the volume of this pentagonal prism.

[tex]A = \frac{1}{4} \sqrt{5(5 + 2 \sqrt{5})}~a^2h[/tex]

Similar to surface area, but different.

[tex]A = \frac{1}{4} * \sqrt{5 * (5 + 2 * \sqrt{5})} * 172^2 * 4[/tex]

And the result of this is...

[tex]A = \sf 2.03594 * 10^5[/tex]

Which is also equal to ⇒ 203,594

please let me know if this helped or was correct, I really spent a lot of time on this and would like to hear any good or bad feedback. Thanks!

Answer:

Step-by-step explanation:

Ice sheets have one particularly special property. They allow us to go back in time and to sample accumulation, air temperature and air chemistry from another time[1]. Ice core records allow us to generate continuous reconstructions of past climate, going back at least 800,000 years[2].

Ice coring has been around since the 1950s. Ice cores have been drilled in ice sheets worldwide, but notably in Greenland[3] and Antarctica[4, 5]. High rates of snow accumulation provide excellent time resolution, and bubbles in the ice core preserve actual samples of the world’s ancient atmosphere[6].

A: Yes, the sum of two sides are greater than the third side.

B: Yes, the sum of two sides are greater than the third side. (Would be an equiilateral triangl.)

C: No, the sum of two sides are less than the third side.

In general, To determine if 3 side lengths are a triangle, use the triangle inequality theorem, which states that the sum of 2 sides of a triangle must be greater than the third side. Therefore, all you have to do is add together each combination of 2 sides to see if it's greater than the third side.

Answer: If replaced: 0.075 or 7.5%

If not replaced: 0.00455 or 0.455%

Step-by-step explanation:

If the diamonds are replaced after each draw:

The probability of drawing a real diamond is 9/12, found by making the numerator the number of real diamonds and adding the total number of diamonds to find the denominator. 3+9 = 12.

9/12 can be reduced to 3/4 by dividing the numerator and denominator by 3.

To find the probability of all 9 diamonds drawn being real, multiply 3/4 by itself 9 times. [tex]3^9[/tex] = 19683. [tex]4^9[/tex] = 262144. This creates a probability of 19683/262144. This cannot be reduced because there is no common factor. To express as a decimal, divide. 19683/262144 = 0.07508. To turn this into a percent, multiply by 100. 0.07508*100 = 7.508

If the diamonds are not replaced after each draw:

Start with the probability of drawing a single diamond: 9/12. After each draw, both the numerator and denominator have 1 subtracted from them, since there is 1 less real diamond and 1 less diamond in total. This will give you the equation (9/12)*(8/11)*(7/10)*(6/9)*(5/8)*(4/7)*(3/6)*(2/5)*(1/4). This equals 0.00455. To find as a percent, multiply by 100. 0.00455*100 = 0.455

Answer:

45 kg

Step-by-step explanation:

Formula for force :

Solving :

The value of the quotient expression [tex]\sqrt[3]{60} \div \sqrt[3]{20}[/tex] is [tex]\sqrt[3]{3}[/tex]

The quotient of numbers or expressions is the division of a number or expression by another

The quotient expression is given as:

[tex]\sqrt[3]{60} \div \sqrt[3]{20}[/tex]

Write as a single expression by applying the law of indices

[tex]\sqrt[3]{60 \div 20}[/tex]

Divide 60 by 20

[tex]\sqrt[3]{3}[/tex]

Hence, the value of the quotient expression [tex]\sqrt[3]{60} \div \sqrt[3]{20}[/tex] is [tex]\sqrt[3]{3}[/tex]

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Answer:

A

Step-by-step explanation:

Endgenuity 2022

The lower bound of the confidence interval is 0.55.

A confidence interval for a proportion is a range of values that is likely to contain a population proportion with a certain level of confidence.

Construct a confidence interval of the population proportion at the given level of confidence x equals = 540, n equals = 900, 96% confidence.

The value of p is;

[tex]\rm p=\dfrac{x}{n}\\\\p =\dfrac{540}{900}\\\\p=0.6[/tex]

The standard error of the proportion is:

[tex]\rm \sigma_p=\sqrt{\dfrac{p(1-p)}{n}} \\\\ \sigma_p=\sqrt{\dfrac{0.6(1-0.6)}{540}} \\\\ \sigma_p=\sqrt{\dfrac{0.6\times 0.4}{540}} \\\\ \sigma_p=\sqrt{\dfrac{0.24}{540}} \\\\ \sigma_p=\sqrt{0.00044}\\\\ \sigma_p=0.02[/tex]

The critical z-value for a 94% confidence interval is z = 2.04

The margin of error (MOE) can be calculated as:

[tex]\rm Margin \ of \ error=\sigma_p \times z =2.04 \times0.02 =0.04[/tex]

Then, the lower bound of the confidence interval is;

[tex]Lower \ bound =p-x\times \sigma_p=0.6-0.04=0.55[/tex]

Hence, the lower bound of the confidence interval is 0.55.

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Answer: I don’t think there is such a line. A Line that passes through the point (3,-9) must have a positive slope, unlike the line y=-5x-2, which has a negative slope. If a line where to go through (3,-9), is would intersect the line you presented.

Answer:

Step-by-step explanation:

let x be the number of the employees of the company ,a year ago.

the statement “today ,the company has 35% more employees than it did a year ago”

means  

[tex]x+\frac{35}{100} x=37800[/tex]

[tex]\Longrightarrow x\times \left( \frac{100}{100} +\frac{35}{100} \right) =37800[/tex]

[tex]\Longrightarrow x\times \left( \frac{135}{100} \right) =37800[/tex]

[tex]\Longrightarrow x=\frac{37800\times 100}{135}[/tex]

[tex]\Longrightarrow x =28000[/tex]

The value of b in the exponential function which is formed by Shanna for the price of land is 8% or 0.08.

Percentage increase is the amount added to the initial value in the percentage part.

The value of a plot of land which is increases 8% every year has the current value of $350000.

The final value owner wants is $570000.  Shanna writes an exponential function of the form, to model the value,v, of the land in t years as,

[tex]v(t)=a\times b^t[/tex]

Here, in this exponential function the value of a is fixed or initial term which is $350000 and the value of b is the constant term which is change factor. Here, the value of b is 8%.

b=8%

b=8/100

b=0.08

Thus, the value of b in the exponential function which is formed by Shanna for the price of land is 8% or 0.08.

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Answer:

[tex]{f}^{2} - 2f - 120[/tex]

Goodluck

Answer:

The answer is 24π because r=12

and c=2πr

=2×π×12

=24π

Answer:

3 3/4 x 2 10/11 = 120/11 which is equal to 10 10/11 which is the simplified answer

Step-by-step explanation:

make them inproper so you have 15/4 and 32/11 which the product is 120/11 which you can make a proper fraction which is 10 10/11

Answer:

x = 0.75 and or x = -0.38

Step-by-step explanation:

If the minus sign after the x was on purpose or if you accidentally put the addition sign after the minus or the other way around basically I have no idea if the solution I provided is correct so here's the solution to both possible equations you might have meant to type instead (and if this was intentional then awesome):

1. 2x - 6x = -3 and 2. 2x + 6x = -3

Let's do 1. first!

[tex]2x-6x=-3[/tex]

Simplify 2x-6x to -4x

[tex]-4x=-3[/tex]

Divide each side by -4

[tex]x=\frac{-3}{-4}[/tex]

And as you know, two negatives equal/make a positive

[tex]x=\frac{3}{4}[/tex] or [tex]x=0.75[/tex]

Now! Let's solve for 2.

[tex]2x+6x=-3[/tex]

Simplify 2x+6x to 8x

[tex]8x=-3\\[/tex]

Divide both sides by 8

[tex]x=\frac{-3}{8}[/tex]

[tex]x=-\frac{3}{8}[/tex] or [tex]x=-0.375[/tex]

Answer:

x = 15,  45 degree angle

Step-by-step explanation:

2x + 15 and 6x - 45 adds up to 90 degrees

(2x + 15) + (6x - 45) = 90

combine like terms:

2x + 6x = 8x

15 + (-45) = -30

8x - 30 = 90

8x - 30 + 30 = 90 + 30

8x = 120

8x / 8 = 120 / 8

x = 15

2(15) + 15

30 + 15 = 45 degree angle

6(15) - 45

90 - 45 = 45

Answer:

x = 15.

Step-by-step explanation:

The figure is a square so opposite sides are congruent and parallel.

The 2 angles marked are interior alternate angles, so they are congruent.

Therefore:

2x + 15 = 6x - 45

15 + 45 = 6x - 2x

4x = 60

x = 15.

Answer: no, because the corresponding congruent angles listed are not the included angles

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Did it on Edge

Answer:

f(x) ≈ −2.42x3 + 15.89x2 − 7.55x + 12

Step-by-step explanation:

Notice that the year data are evenly spaced. Check the first differences between the total number or units to see if the data set is linear.

First Differences

41 − 18 = 23

67 − 41 = 26

82 − 67 = 15

69 − 82 = −13

17 − 69 = −52

Because the first differences are not constant, a linear model is not the best model of the data. Check the second differences to see if the data set can be modeled by a quadratic function.

Second Differences

26 − 23 = 3

15 − 26 = −11

−13 − 15 = −28

−52 − (−13) = −39

Because the second differences of the independent variable are not constant, a quadratic model is not the best model of the data. Check the third differences to see if the data set can be modeled by a cubic function.

Third Differences

−11 − 3 = −14

−28 − (−11) = −17

−39 − (−28) = −11

The third differences are approximately the same so we will use a cubic function to represent the data.

Enter the data into a calculator. Plot the data and find the cubic regression equation that best models the data.

f(x) ≈ −2.42x3 + 15.89x2 − 7.55x + 12

Answer:

32 cm.

Step-by-step explanation:

Lateral area = πrL

where r = radius of the base and L = the slant height.

The radius = 1/2 * diameter = 4.5 cm.

So from the values given:

144π =  π* 4.5 * L

4.5L = 144

L = 144/4.5

= 32 cm.

Answer:

1130,97

Step-by-step explanation:

Answer:

  y = 3^-x

Step-by-step explanation:

Reflecting a point across the y-axis changes the sign of the x-coordinate. The graph of a function y = f(x) will be reflected in the y-axis by replacing x with -x. The reflected function is y = f(-x).

__

The reflected function is ...

  y = 3^-x . . . . . . x has been replaced by -x