Question

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A CD makes 58 1/2 revolutions in 3/4 min.

Complete the unit rate.

[ ] revolutions/min

Answer 1

@Jhannybean

Answer 2

Rewrite 58 1/2 as a whole number ratio (fraction) \(\frac{58 \cdot 2 +1}{2} = \ ?\)

Answer 3

57/2?????

Answer 4

(58 x 2) +1 = ?

Answer 5

117

Answer 6

So it's \(\frac{117}{2}\). Now we can write this as a decimal : 58.5 rev.

Net we have \(\frac{3}{4}\). Is you plug this into your calculator, what decimal value do you get?

Answer 7

????????????

Answer 8

You know that 1/4 can be written as 0.25, yes?

Answer 9

yes :)

Answer 10

Think of a dollar. It has 4 quarters. If 4 quarters = 1 dollar, then 1 quarter/4 quarters = 25 cents.

So what does 3 quarters/4 quarters = ?

Answer 11

divide

Answer 12

No what value do you get.

Answer 13

3/4 im really bad at this

Answer 14

We got 1/4 = 25 cents, so if you have 3 quarters how many do you have?

Answer 15

75

Answer 16

Good, finally.

Answer 17

So 3/4 = 0.75 min.

Now we just input this into our calculator.

58.5 rev / 0.75 min = ___________ rev/min

Answer 18

With this you will find your answer :)

Answer 19

78??