Question

Fred worked these hours during the week: 8, 4 1/2, 3 3/4, 7 1/2, 4 3/4. If he is paid $5.15 per h, how much did he earn?

$133.90

$146.78

$144.20

$139.05

Answer 1

He earns $146.78

B is correct.

Explanation:

Fred worked these hours:

`8, 4(1)/(2), 3(3)/(4), 7(1)/(2), 4(3)/(4)`

He is paid $5.15 per hour.

First we find total number of hours he worked.

So, we will add all the value

`\text{Total hours}=8+4(1)/(2)+3(3)/(4)+7(1)/(2)+4(3)/(4)`

First we change mixed fraction to fraction

`\text{Total hours}=8+(9)/(2)+(15)/(4)+(15)/(2)+(19)/(4)`

`\text{Total hours}=28.5\text{ hours}`

Fred worked total 28.5 hours. He is paid $5.15 per hour.

Total earn = Total number of hours x Rate per hour

`\text{Total earn}=28.5* 5.15\approx 146.78`

Hence, He earns $146.78

Answer 2

Total hours earned = 8 + 4 1/2 + 3 3/4 + 7 1/2 + 4 3/4 = 28 1/2 = 28.5

Amount earned = 28.5 x 5.15 = $146.78