- 5 1/4 - (- 7 1/2) =
- 21/4 + 15/2 =
-21/4 + 30/4 =
9/4 or 2 1/4 <==
D because I think it is Ddddd
Answer:
620
Step-by-step explanation:
7 is near 10 so you round to the next number on the 10 table
Answer:
dV/dt = 155.74 ft^3/minute
Step-by-step explanation:
Volume V = Area × thickness
Area A= πr ^2
Thickness = 0.2 ft
Volume V = 0.2A = 0.2πr^2
V = 0.2πr^2
Differentiating both sides;
dV/dt = 0.2π × 2r dr/dt = 0.4πr.dr/dt
Given;
r = 400 ft
dr/dt = 0.31 ft/minute
π = 3.14
Substituting the values
dV/dt = 0.4πr.dr/dt = 0.4 × 3.14 × 400 × 0.31
dV/dt = 155.74 ft^3/minute
