Answer:
Step-by-step explanation:
520
This problem is
boys + girls = total
Boys = 442
Girls = 15% of the total
Therefore, substituting in, gives us:
442 + .15t = t, where t is total
Then 442 = .85t and
t = 520
Right angles
1139.2 hours
6.40 x 178 = 1139.2
32