What is the surface area in square inches of a basketball that has a diameter of 9 inches

Mathematics

1 answer:

Vlada [557]2 years ago

5 0

if its diameter is 9, that means its radius is half that, or 4.5.

$\textit{surface area of a sphere}\\\\ SA=4\pi r^2 ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=4.5 \end{cases}\implies \begin{array}{llll} SA=4\pi (4.5)^2\implies SA=81\pi \\\\\\ SA\approx 254.47~in^2 \end{array}$

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frozen [14]

Answer:

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Step-by-step explanation:

Find the rate of change [slope]:

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3 years ago

I am so confused pls help me because I can't see what she did wrong.

mixas84 [53]

Answer:

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She incorrectly subtracted 0.454 - 0.02.
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Step-by-step explanation:

Here is how it should've been:

Step 1:

0.454 - 0.02
= 0.434

Step 2:

0.434 + 0.056
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Step 3:

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2 years ago

(a) Find an angle between 0° and 360° that is coterminal with – 120°.

Novay_Z [31]

Answer:

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b) $\frac{15\pi}{4}$

Step-by-step explanation:

Coterminal angles have the same terminal sides in standard position.

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