So if she still has $27.12, then during her call, she used a total of $2.88.
$2.88 = 288 cents.
Therefore 288 divided by 6 = 48
Therefore the answer is 48 minutes.
Answer:
This should help.
Step-by-step explanation:
The attached image will help.
Answer:
7/20
Step-by-step explanation:
Answer:
Differential equation will be
Step-by-step explanation:
Let V is the volume of the raindrop and surface area of the drop is S.
Since volume of the raindrop reduces at the rate directly proportional to the surface area.
Or where k is the proportionality constant.
We know volume of the spherical drop V =
Since S =
Therefore,
Since coefficient of is a constant.
Then
Therefore, differential equation for the volume of the raindrop as function of time will be