Math
posted by Anonymous .
one plane at 520 feet is ascending at the rate of 40 ft per minute, while another plane at 3800 ft is
descending at the rate of 120 ft per minute.
How long will it take the 2 planes to be at the same altitude?

Equate their altitudes in feet and solve for t (in minutes):
520+40t = 3800  120t
Respond to this Question
Similar Questions

coordinate algebra
Jon is flying an airplane.He is currently 3,5000 feet in the air and he is ascending at a rate of 500 feet per minute.How many minutes it will take him to reach a height of 9,000 feet 
Math
What is 9 kilometers per hour converted into feet per minute? 
Health
9. Kristy, a 13yearold girl, has a resting heart rate of 67 beats per minute. Using the lower and upper limit reserve training percentages of 50 percent and 85 percent respectively, what is Kristy’s target heart rate range? 
Math
A plane was flying at an altitude of 30,000 feet when it began the descent toward the airport. The airplane descends at a rate of 850 feet per minute. a. What is the function rule that describes this situation? 
physics
Two planes are initially separated by a horizontal distance of 350 km. Plane A is positioned 350 km west of the Plane B. Plane A is initially traveling at a velocity of 60 m/s east. Plane B is traveling at a velocity of 45 m/s west. … 
MATHS
A plane is flying at 31,348 feet. It needs to rise to 36,000 feet in two stages. In stage 1, it rises 5% of its initial altitude of 31,348 feet. In stage 2, it rises at a rate of 140.3 feet per minute. How many minutes does it take … 
maths
A plane is flying at 31,348 feet. It needs to rise to 36,000 feet in two stages. In stage 1, it rises 5% of its initial altitude of 31,348 feet. In stage 2, it rises at a rate of 140.3 feet per minute. How many minutes does it take … 
Math
Alice paints at a rate of 10 square feet per minute and Bob paints at a rate of 8 square feet per minute. If they work together, how many square feet can they paint per minute? 
math
625 feet and decends at a rate of 300 feet per minute. 400 feet and decends at a rate of 150 feet per minute.after how many minutes will the plane be at the same altitude 
Calculus
Harold is in an airplane that is flying at a constant height of 4505 feet away from a fixed observation point. Maude, whose eyes are 5 feet from the ground, is standing at this point and watching the plane; the angle between her line …