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STALIN [3.7K]
3 years ago
11

If 5 notebooks cost $5.25, how much 3 notebooks cost?

Mathematics
2 answers:
g100num [7]3 years ago
6 0
$5.25/5=$1.05
So each notebook costs $1.05
Therefore 3 would cost $3.15
frez [133]3 years ago
4 0
You divide $5.25 by 5 to see how much each notebook costs. which is $1.05 then you multiply that by 3. which is $3.15
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The radius of hole is 5 feet

Step-by-step explanation:

Depth of conical hole = 9 feet

Let the radius of hole be r

Volume of conical hole =\frac{1}{3} \pi r^2 h

So, Volume of conical hole =\frac{1}{3} \pi \times r^2 \times 9

We are given that volume of a CONE-shaped hole is 75pi ft cubed.

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\frac{1}{3} \times r^2 \times 9=75

r^2=\frac{75 \times 3}{9}

r=\sqrt{\frac{75 \times 3}{9}}

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