To solve this problem, we need to find the unit rate (the amount of windows cleaned per hour) and multiply by 7.
To find the unit rate, we need to divide 38 by 2:
38 / 2 = 19
Now, we need to multiply this by 7:
19 * 7 = 133
In 7 hours, the window washer can clean 133 windows.
Hope this helps!
