The quotient of three times a number and 4 is at least -16

Quotient is division,

Writing the equation out you get:

3x/4 ≥ -16

Now we can solve by x.

First multiply both sides by 4:

3x ≥ -64

Now divide both sides by 3:

x ≥ -64/3

i belive those are the ones that are under 90 degreese.