Help me! ASAP please need this quick ah

A force applied at an angle to the direction of motion of an object can cause it to change direction.

Ex: A side wind will cause an airplane to change its direction. It is possible that the object keeps going at the same speed if the force is applied perpendicular to the direction of motion. But the velocity of the object changes.

d. air pressure decreases as altitude increases.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form