+0  
 
0
337
2
avatar

The altitude a (in feet) of a plane t minutes after liftoff is given by a=3400t+600. How many minutes after liftoff is the plane at an altitude of 21,000 feet?

Guest Aug 31, 2017
edited by Guest  Aug 31, 2017

Best Answer 

 #1
avatar+554 
+1

So I guess time is in minutes.

The question says: How many minutes after liftoff is the plane at an altitude of 21,000 feet?

 

So... in the equation a=3400t+600, we plug in 21,000 for a. Because we have to find 't' when 'a' is 21,000.

That gives us 21,000 = 3400t+600.

Subtract 600 to both sides to get 20,400 = 3400t

Divide both sides by 3,400 and you get 6 = t.

 

So it takes 6 minutes for the plane to be at an altitude of 21,000.

6 minutes.

Gh0sty15  Aug 31, 2017
 #1
avatar+554 
+1
Best Answer

So I guess time is in minutes.

The question says: How many minutes after liftoff is the plane at an altitude of 21,000 feet?

 

So... in the equation a=3400t+600, we plug in 21,000 for a. Because we have to find 't' when 'a' is 21,000.

That gives us 21,000 = 3400t+600.

Subtract 600 to both sides to get 20,400 = 3400t

Divide both sides by 3,400 and you get 6 = t.

 

So it takes 6 minutes for the plane to be at an altitude of 21,000.

6 minutes.

Gh0sty15  Aug 31, 2017
 #2
avatar+87641 
0

 

Excellent, Gh0sty....!!!!!!

 

 

cool cool cool

CPhill  Aug 31, 2017

9 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.