The speed of the car changes from 12 metre per square to 24 metre per square in 1 minute the magnitude of acceleration of the car is a)Zero B )0.25 metre square c)1÷13 m/s^2 d.) 1÷5m/s^2

i guess it’s a and b

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

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray