Answer:
1/3 quart per hour
Step-by-step explanation:
To find the usage rate in quarts per hour, you can use the formula:
Usage Rate = (Amount Used) / (Time)
In this case, the student uses 1/2 quart of paint in 3/4 hour.
Usage Rate = (1/2 quart) / (3/4 hour)
To divide by a fraction, you can multiply by its reciprocal. In this case, you can multiply the numerator and denominator of the usage rate by the reciprocal of 3/4, which is 4/3.
Usage Rate = (1/2 * 4/3) / (3/4 * 4/3)
Calculate:
Usage Rate = 1/3
So, the student's usage rate is 1/3 quart per hour.