The answer would b be d 8 I think
You would just need to take the square root of 121 since it is square. So:
√121= 11 inches per side
19.76/13 = $1.52
$1.52 x 20 = $30.40
Find the average value
12 hours + 10 hours = 22 hours
22 hours/2 = 11 hours
Together it will take Keith and Mike 11 hours to clean the store.
