Water in a pool starts at a height of 200 cm and is pumped out at a constant rate so that the height decreases by 5 cm per minute.

The answer is 40

Step-by-step explanation:

If you have to say how long it will take, it will take 40 min. 200÷5=40

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500

8 2/3 is the answer

step-by-step explanation: just use a calculator