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)

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

iu

step-by-step explanation:

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

contact me if you have any questions you are welcome.