Acylindrical water tank is being filled with a hose. the depth of the water increases by 1 1/4 feet per hour.

how many hours will it take for the water level in the tank to be 3 1/2 feet deep?

enter your answer as a mixed number in simplest form

hours

Step-by-step explanation:

Given: The rate of increase of depth of water = feet per hour.

Depth =

Let h be the number of hours the water level in the tank to be feet deep.

We know that the rate of change of depth of water with respect to time is given by :-

Hence, it will take hours for the water level in the tank to be feet deep.

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.