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2 years ago

The height of an airplane during a landing is given by 22,000+(−480t)where t is the time in minutes. (The picture is below)

Mathematics

2 answers:

Leokris [45]2 years ago

8 0

Answers

19,600 feet

17,200 feet

14,800 feet

12,400 feet

Explanation

The expression 22,000+(−480t) represent the height reached by the airplane at a given time t.

# when t = 5 minutes

22,000+(−480×5) = 22,000 - 2,400

= 19,600 feet

# when t = 10 minutes

22,000+(−480×10) = 22,000 - 4,800

= 17,200 feet

# when t = 15 minutes

22,000+(−480×15) = 22,000 - 7,200

=14,800 feet

# when t = 20 minutes

22,000+(−480×20) = 22,000 - 9,600

= 12,400 feet

kolbaska11 [484]2 years ago

6 0

Alright, since t is time and 22000+(-480*t)=height, we can plug the values of t in. For example, for 5, we can plug 5 in for t to get 22000+(-480*5)=19600. I challenge you to do the rest on your own!

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* Lets explain how to solve this problem

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∴ The x-intercepts are 1 and 9

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* Lets equate the answers by zero to find the x-intercept

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