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4 years ago

How to find area of circle using the given circumfrece

1 answer:

4 0

Use the given circumference C in the formula C=2(pi)(r) to solve for the radius r.
Then use that radius to get the area from the equation A=(pi)(r)^2.

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Item 15 Fill in the blank so that the ordered pair is a solution of y=12x+2. ( , 14)

maxonik [38]

Answer:

(1, 14)

Step-by-step explanation:

If you substitute the 14 in;

14 = 12x+2

-2 -2

12 = 12x

/12 /12

1 = x

7 0

3 years ago

Find the expected value for the random variable. | 9 12 15 18 21 P(z) 0.16 0.25 0.36 0.17 0.06 Z E(z) = (Type an integer or a de

dmitriy555 [2]

Answer:

The expected value for the random variable is 14.16.

Step-by-step explanation:

We are given the following data below;

Z P(Z) $Z \times P(Z)$

9 0.16 1.44

12 0.25 3

15 0.36 5.4

18 0.17 3.06

21 0.06 1.26

Total 1 14.16

Now, the expected value for the random variable Z is given by;

E(Z) = $\sum Z \times P(Z)$

= $(9 \times 0.16) + (12 \times 0.25) +......+(21 \times 0.06)$

= 14.16.

5 0

4 years ago

Please anyone i really need Nitro Type Gold. I will give brainiest and all my nitro type money to you. My username is Foxymadn11

Scrat [10]

Answer:

wait what I'm confused

6 0

3 years ago

Read 2 more answers

emma is planning a surprise party. She is considering using one of two venues. The banquet of hall A will cost $862 fot a reserv

mylen [45]

Ok for this problem, there are 2 equations representing hall A and hall B

hall A: y=76x+862 where x=number of dinners and y=total cost

hall B: y=75x+894 for the same variables

To find where the 2 meet, simply substitute one equation into the other, creating: 76x+862=75x+894

Solving this, we find that x=32, so at 32 guests, the cost would be the same

For part 2, put the answer for part 1 into either equation from the start, so y=76(32)+862, or y=3294

And we already found that x=32, which represents the # of guests

4 0

3 years ago

Given a circle with a diameter of 2/3, which equation expresses π as the ratio of the circumference of a circle to its diameter?

Advocard [28]

The circumference of a circle can be found using the equation: c = 2πr, where c=circumference and r=radius.
The radius of the circle is also equal to half the diameter: r = $\frac{1}{2} d$ , where r=radius and d=diameter.

Plug the equation for the radius of the circle into the equation for the circumference of the circle and simplify to get an equation that relates circumference and diameter:
$c = 2 \pi r\\
c = 2 \pi (\frac{1}{2} d)\\
c = \pi d$

Now solve that equation for π (aka isolate π) to get the ratio of the circumference to the diameter:
$c = \pi d \\
 \pi = \frac{c}{d}$

You know that the diameter, $d = \frac{2}{3}$ , so plug that into your ratio to get your answer. Remember that dividing by a fraction is equal to multiplying by the inverse of that fraction (aka the fraction flipped):
$\pi = \frac{c}{d}\\
\pi = \frac{c}{\frac{2}{3}}\\
\pi = c \times \frac{3}{2} \\
\pi = \frac{3c}{2} 
$

Your answer is B) 3C/2 = π.

6 0

3 years ago

Read 2 more answers