Answer:
8 π .
Step-by-step explanation:
radius increases at a constant rate of 1 in/sec.
dr / dt = 1
where r is radius .
radius after 4 sec
r = 1 x 4 = 4 in
area A = π r²
differentiating both sides
dA / dt = 2 π r dr / dt
Putting dr / dt = 1 , r = 4 in
dA / dt = 2 π x 4 x 1
= 8 π sq in per sec.
Area increases at the rate of 8 π per sec.
Answer:
Step-by-step explanation:
Answer:
9.4
Step-by-step explanation:
Answer:
125/8
is the final answer
Step-by-step explanation:
1.transform the expression
2.calculate
3.(final answer)
Answer:
The answer to the quesion is B.... 3/8in
Step-by-step explanation:
