Answer:
To find out how many windows Kendall can wash in one hour, we can divide the number of windows washed by the time taken:
Number of windows washed per hour = (Number of windows washed) / (Time taken)
We can first convert the mixed number 10 1/2 to an improper fraction:
10 1/2 = (10 x 2 + 1) / 2 = 21/2
Substituting the given values:
Number of windows washed per hour = (21/2) / (3/4) hours
To divide by a fraction, we can multiply by its reciprocal:
Number of windows washed per hour = (21/2) x (4/3) = 28 windows/hour
Therefore, Kendall can wash 28 windows in one hour at this rate.