A rocket is rising vertically at a rate of 5400 miles per hour. An observer is on the ground 30 miles from the launch pad. How fast is the angle of elevation changing when the rocket is 40 miles in the air

7

step-by-step explanation:

20 feet per second

hope i

-lavira : )

step-by-step explanation:

total income = price of one ticket   *   number of tickets sold

  y                 =     4                                   x

so the equation is y=4x     with x≥0   because number of tickets sold can not be negative

thus the equation is a semi -line with an end point at

(0,0)

passing through :

x=1     y=4(1) = 4   so through (1,4)

well, because the $0.25 is an added cost depending on how many minutes, the answer would be y = 30 + 0.25x.