Assume that forwards is positive and backwards is negative for motion of a car. If a car is in reverse and is slowing down, the acceleration is a) negative
b) depends on the direction of the displacement vector
c) positive
d) zero

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?