2 years ago

If the radius of a circle is doubled, how does the area of the circle change?

1 answer:

7 0

If the radius of a circle is doubled, the area of the circle is quadrupled.
area of a circle = 2(pi)(radius)^2
when r = 2, area = 8pi
when r = 4, area = 32pi
you can see that the area is quadrupled

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Eric earned 60 points on his last test. If there was 75 possible points, WHAT was his PERCENT grade?

e-lub [12.9K]

Answer:

Step-by-step explanation:

Eric-- 60/75

Percentage of Eric ---- 60/75 *100

Eric got 80 percentage in his last test.

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3 years ago

Read 2 more answers

Which is greater .836 or .83

anygoal [31]

Just do like this
.836
.83
.83=.830
which one has bigger numbers?
.836 or
.830

the answer is .836

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4 years ago

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galben [10]

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3 years ago

a parking meter contains $8.25 in dimes and quarters. after emptying the meter, the worker counts 51 coins. how many quarters an

Marianna [84]

<h3>30 dimes and 21 quarters are present</h3>

<em><u>Solution:</u></em>

Let "d" be the number of dimes

Let "q" be the number of quarters

1 dime = $ 0.10

1 quarter = $ 0.25

The worker counts 51 coins

Therefore,

d + q = 51

d = 51 - q ---------- eqn 1

<em><u>A parking meter contains $8.25 in dimes and quarters</u></em>

Therefore,

0.10d + 0.25q = 8.25 -------- eqn 2

<em><u>Substitute eqn 1 in eqn 2</u></em>

0.10(51 - q) + 0.25q = 8.25

5.1 - 0.10q + 0.25q = 8.25

0.15q = 3.15

Divide both sides by 0.15

Substitute q = 21 in eqn 1

d = 51 - 21

Thus 30 dimes and 21 quarters are present

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3 years ago

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Brut [27]

What picture are you talking about

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3 years ago