PLEASE HELP ON 13 TO BE MARKED THE BRAINLIEST

  D) 10000 feet

Step-by-step explanation:

We are told that for some actual altitude, the reading is ...

  30,000 ft = (1 -25%)altitude = 0.75×altitude

Multiplying by 4/3, we have ...

  (4/3)(30,000 ft) = altitude = 40,000 ft

To get to 30,000 ft, the plane must descend ...

  40,000 ft -30,000 ft = 10,000 ft

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

idk

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