Π x 2 x 15² is not a correct expression of the volume
1st day= $5
2nd day = 5^2 = $25
3rd day = 25×3= $75
5 + 25 + 75 = $105
Answer:
7 seconds
Step-by-step explanation:
SA = 4πr²
784π = 4πr²
196 = r²
r = 14
At 2 cm/s, it takes 7 seconds to reach a radius of 14 cm.
Your good its 80 one way you can always tell if its a triangle is if all the angles add up to 180