Area of a sphere formula = 4/3 pi x r^3
4/3 pi x 4^3 x 0.075 = 20.106
20.106 rounds to 20 to the nearest pound
Answer:
Step-by-step explanation:
19 * 70 = ( 20-1) * 70
= 20*70 - 1*70
= 1400 - 70
= 1330
Answer:

Step-by-step explanation:




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Area=1/2 times height times base
base=2.5
area=3.75
subsitute
3.75=1/2 times height times 2.5
multiply both sides by 2 to get rid of fraction
7.5=height itmes 2.5
divide both sides by 2.5
3=height
sail is 3 meters tall