Aperson is initially driving a car east down a straight road. the magnitude of the instantaneous acceleration is decreasing with time, but the direction of the acceleration is always to the east. the speed of the car is

if acceleration of car decreasing then the velocity of car must increase but the rate of increase will be slower than initial rate

Explanation:

As we know that instantaneous acceleration is defined as the rate of change in velocity

so we will have

so acceleration gives us an idea about the rate by which velocity is increasing

now if the acceleration of a car is decreasing with time then it shows that the rate by which velocity of car is increasing with time is decreasing but still the car velocity is going up.

So we can say that if acceleration of car decreasing then the velocity of car must increase but the rate of increase will be slower than initial rate

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.