Determine the orientation of the parabola.
directrix: x= -4; p=-3

see explanation

Step-by-step explanation:

Since the directrix has equation x = - 4, that is a vertical line

This indicates that the parabola is horizontal

Since p = - 3

This indicates the parabola opens to the left.

The parabola is horizontal and opens to the left.

Step-by-step explanation:

Givens

The directrix is and

Now, if the directrix has the form , it means the directrix is vertical and the parabola is horixontal.

Its equation would have the form .

Now, is , the parabola would open to the negative side, and its equation is

Therefore, the parabola is draw towards the negative numbers of horizontal axis.

The image attached shows the direction of the parabola.

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet