Answer:
9 groups
Step-by-step explanation:
The answer you are looking for is c
Answer:
W=2.73
Step-by-step explanation:
Is means equals and of means multiply
W = 7% of 39
Change to decimal form
W = .07 * 39
W=2.73
You should Google it because I forgot but others might know
Area of one blade is
A=(1/2)b*h=(1/2)7*4=28/2=14
for four blades
14*4=56
