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:
The area of this triangle is..
Step-by-step explanation:
6 x 10 divided by 2 = 30
Answer:
40 cm is 8% of 5 m
Step-by-step explanation:
40 cm / 5m
= 40cm / 500cm
= 4/50
= 2/25
= 8%
Answer: 3 minutes
To solve this, I plugged 0.25 into the y value since it represents the amount of sand remaining. I then solved for the x value which gave me a value of 3. (I hope this helps)