Your answer would be 20 minutes.
12/3=4 grapefruits. 4*5=20
12 bagels = 1 box
3 = number of boxes
12 bagels per box × 3 boxes = 36 total bagels
<span>the approximate measure of the largest angle in the triangle is 75.5 degrees</span>
Log[3](58)=3.69597450
log[3](58) to a logarithm in base 4= 167.957<span>
if you still need it.</span>