Question

Tinkerbell is able to make 42.6 pounds of fairy dust in 2.5 hours. What is her rate of making fairy dust per hour?

a) 15.4 pounds per hour
b) 17.0 pounds per hour
c) 10.7 pounds per hour
d) 16.8 pounds per hour

Answer 1

Tinkerbell's rate of making fairy dust per hour is calculated by dividing the total pounds of fairy dust by the total hours spent. The result is a rate of 17.04 pounds per hour, which is approximately 17.0 pounds per hour, hence the answer is (b) 17.0 pounds per hour.

Step-by-step explanation:

To find Tinkerbell's rate of making fairy dust per hour, we need to divide the total amount of fairy dust she makes by the total hours she spends making it. The formula to calculate the rate is:

Rate = Total Quantity / Total Time

Plugging in the values given in the question:

Rate = 42.6 pounds / 2.5 hours

Calculating the rate we get:

Rate = 17.04 pounds per hour

If we round down to the nearest tenth, as is typical in math problems, we get:

Rate = 17.0 pounds per hour

So the correct answer is (b) 17.0 pounds per hour.