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Katarina [22]
3 years ago
8

If the simple interest on $7000 for 4 years is $2520 then what is the interest rate

Mathematics
1 answer:
lidiya [134]3 years ago
6 0

let

i= Interest

p= Principle

r= rate

t= time

data given

i= $2520

p= $7000

t= 4years

r= ?

From the formula

i= prt

we make 'r' the subject by multiplying by pt both sides

i/pt=prt/pt

i/pt=r

its the same like

r=i/pt

r=$2520/($7000×4)

r=$2520/$28000

r=3/350

r=0.09%

therefore the interest rate is 0.09%

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klasskru [66]

Answer:

The money he can save by buying them at Big 5 is $76.80.

Step-by-step explanation:

Given:

Footballs sell for $27.99 each at Sporting Goods.

Footballs sell for $21.59 each at Big 5.

The coach buys a dozen footballs.

Now, to find the amount he save by buying them at Big 5.

So, first we find the cost of footballs at Sporting Goods and at Big 5.

1 Dozen = 12 pieces.

Thus, the cost of footballs at Sporting Goods =

\$27.99\times 12 =\$335.88

And, the cost of footballs at Big 5 =

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The amount coach can save by buying them at Big 5 =

\$335.88-\$259.08=\$76.80.

Therefore, the amount he can save by buying them at Big 5 is $76.80.

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