Answer:
24.5
Step-by-step explanation:
7.2 is the square root of 53
Answer:
3 inches
Step-by-step explanation:
⇒r3=36π×3/4π
or r3=27
Taking cube root of both sides
r=3 inch
Answer:
11 gallons
Step-by-step explanation:
there is 4 quarts in one gallon so 44 divided by 4 = 11
Answer:
90 days.
Step-by-step explanation:
dy/dt = - 0.0032y
dy = -0.0032y dt
dy/y = -0.0032 dt
Integrating:
ln y = -0.0032t + c where c is some constant
y = e^(-0032t) + e^c
y = A e^(-0032t) where A is a constant.
At time 0 we can let y = 1 so in that case A = 1
When there is 0.75 of y left:
0.75 = e^-0032t
ln 0,75 = -0032 t
t = ln 0.75 / -0032
t = 90.