At 5:00 am, here's what we know about two airplanes: Airplane #1 has an elevation of 38520 ft and is descending at the rate of 750 ft/min. Airplane #2 has an elevation of 9400 ft and is climbing at the rate of 550 ft/min. (1) Let t represent the time in minutes since 5:00 am, and let E represent the elevation in feet. Write an equation for the elevation of each plane in terms of t . plane #1: E ( t ) = plane #2: E ( t ) =

Plane 1

Plane 2

Step-by-step explanation:

As each plane is travelling at constant speed, each equation can be modelled after this expression:

Where:

- Intial elevation of the airplane, measured in feet.

- Climbing/Descending rate of the airplane, measured in feet per minute. (Positive - Climbing, Negative - Descending)

- Time, measured in minutes.

Equations are described below:

Plane 1

Plane 2

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

x+14

step-by-step explanation: