Question

The altitude a (in feet) ofn a plane t minutes after loiftoiff is given by a=3400t+600. How many minutes after lift off is the oklanbe at an altitude of 21000 feet?

Answer 1

Explanation:

To find the number of minutes after lift off when the plane is at an altitude of 21000 feet, we can set up the equation:

→ a = 3400t + 600

where,

• a is the altitude in feet
• t is the time in minutes.

We can substitute 21000 for a in the equation:

→21000 = 3400t + 600

→21000 - 600 = 3400t

→20400 = 3400t

→20400/3400 = t

→ 6 = t

Therefore, the plane is at an altitude of 21000 feet 6 minutes after lift off.