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3 years ago

HELP PLS HELP IT EASY IT WORTH 30 POINTS

Mathematics

1 answer:

Katena32 [7]3 years ago

5 0

Answer:

Radius = 2 yd

Diameter = 4 yd

Step-by-step explanation:

circumference = 2 $\pi$ r (where r is the radius)

if circumference = 4 $\pi$ , then

4 $\pi$ = 2 $\pi$ r

⇒ 4 = 2r

⇒ 2 = r

⇒ radius = 2 yd

diameter = 2r

= 2 x 2

= 4 yd

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He borrowed "a" at 7% and "b" at 8.25%

now, whatever "a" and "b" are, we know, his student loan was 9000, thus
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now, he owes 7% or 7/100 for "a", what's 7% of a? well, 7/100 * a or 0.07a

he owes 8.25% of "b", how much is 8.25% of b? well, 8.25/100 * b or 0.0825b

now, we know, at the end of the year, he owed for both loans, 706.25 in interest
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thus $\bf \begin{cases}
a+b=9000\implies \boxed{b}=9000-a\\
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solve for "a", to see how much he borrowed at 7%

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4 years ago

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Answer:

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Answer:

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