How can a doctor use rational numbers on a regular basis?

7/8 x + 20 = 3/4 x + 50

Gabe Amodeo, a nuclear physicist, needs 60liters of a 40%acid solution. He currently has a 30 % solution and a 60% solution. How many liters of each does he need to make the needed 60 liters of 40 % acid solution?

John bought a car for $65,000. If the value of the car depreciates by 8% each year, how much will the car be worth at the end of 2 years?

What is r - 9 for r = 20

Suppose the temperature outside is dropping 3 degrees each hour. How much will the temperature change in 8 hours? 0-240

Jacob has 17 yards of fabric. He uses 1 third of it to make a Cape. How many yards of fabric does Jacob use for the cape

What amount of a 75% acid solution must be mixed with a 25% solution to produce 500 mL of a 60% solution?

The height of a ball thrown directly up with a velocity of 10 feet per second from a initial height of of 100 feet is given by the equation h (t) = - 16tsquared + 10t + 100, where t is the time in seconds and h is the ball's height, measured in feet.

Find the percent of each number 350% of 96

7/5 x 8 (do not reduce your answer)