7 hours a week. One hour a day
The correct answer to your question is B.
$7.50 * 18.5 hrs = $138.75
$7.50 * 20 hrs = $150
138.75 + 150 = 288.75
She raises the price by ¢0.75
So now it is $8.25 per hour
(I guessed on a calculator and got it right)
Multiply 8.25 by 35 and you get 288.75
Your answer is 35
-GoldenWolfX
To get the answer we can use proportion.
30----------100%
12-----------x
Cross multiply now
30x=12*100%
30x=1200% /:30 (divide both sides by 30)
x=40% - it's the percentage of cars which finished the race.
100%-40%=60% - it's the answer
74.542=75
63.73=64
i hope this helps you