3 years ago

How can you calculate the area of the circle if you know the circle’s circumference?

1 answer:

8 0

Divide the circumference by pi, then divide that by 2, then you would have the radius, and the area is r squared multiplied by pi

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Simplify the expressions by combining like terms<br><br> 10r - 5r + 3r - 8r

Yuri [45]

Answer:

Step-by-step explanation:

Combine like terms, perform the operations with the coefficients of the variable, then write the variable.

10r - 5r + 3r - 8r

= 5r + 3r - 8r

= 8r - 8r

= 0

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2 years ago

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What is the answer of this question?

polet [3.4K]

Answer:

116

Step-by-step explanation:

8.2 / 2 = 4.1

a = $\sqrt{7^{2}-4.1^{2} } = 5.6736$

0.5 x 8.2 x 5.6736 = 23.2618

23.2618 x 5 = 116.309 = 116

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3 years ago

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abruzzese [7]

Answer:

Step-by-step explanation:

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2 years ago

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19/3÷3 reduce to lowest terms

Digiron [165]

19/9 because 19/3 times 1/3 is 19/9

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Carbon-14 dating assumes that the carbon dioxide on Earth today has the same radioactive content as it did centuries ago. If thi

defon

7978 years

Step-by-step explanation:

A = A02^(-t/hl)

where hl = half-life.

Dividing both sides by A0 and taking the logarithm, we get

ln(A/A0) = -(t/hl)ln2

or solving for t,

t= -(hl)ln(A/A0)/ln2

note that A/A0 = 0.38

t = -(5715 yrs)[ln(0.38)/ln2]

= 7978 years

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2 years ago