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3 years ago

Suppose a varies directly as b, and a =8 when b =3 find b when a =24

Mathematics

1 answer:

Natasha2012 [34]3 years ago

4 0

Answer:

b=9

Step-by-step explanation:

since a varies directly as b,

a=kb

k=a/b

k=8/3

but when a=24, b will be given by

b=a÷k

b=24÷8/3, b=24×3/8

b=9

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3 years ago

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Answer:

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Step-by-step explanation:

<u><em>The question is</em></u>

A window is shaped like a semicircle with a diameter of 30 inches. What is the area of the window? Round to the nearest square inch

we know that

The area of semicircle is equal to

$A=\frac{1}{2}\pi r^{2}$

we have

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substitute

$A=\frac{1}{2}\pi (15)^{2}$

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assume

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3 years ago