Times 4 because, 5 times 4 is 20, 20 times 4 is 80 and so on.
Answer:
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Step-by-step explanation:
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For the first one write 9 divided by 2 gives your your radius an it’s 3.5. the formula is 2 x 3.14 x radius and that gives you 21.98.
the 2nd one is 2 x 3.14 x 9 = 56.52
the 3rd is 2 x 3.14 x 5= 31.4
formula is always 2 x 3.14 (or pie) x radius
to get your radius from your diameter you do your diameter divided by 2
C. Buying it a percent discount without sales tax.
Because of not having to pay $10, so it is awesome.
