An airplane at cruising altitude starts descending for a landing. the function f (t) = 33,600 – 1500t describes its altitude t minutes after starting its descent. what is the airplane's altitude after 10 minutes?

He expression 2(l + w) is used to calculate the perimeter of a rectangle, where l is length and w is width. if the length is fraction 2 over 3 unit and the width is fraction 1 over 3 unit, what is the perimeter of the rectangle in units? fraction 2 over 3 unit 1 unit 1fraction 2 over 3 units 2 units

Can someone check if i did this correct. it’s number 4 if you’re wondering.

In which form is the following function written? y = - 2(x – 3)(x + 5)