An object travels along the x-axis such that it’s position at time f is given by the function x(t)=-2/t+1. How many times greater is the instantaneous speed of the object at t=7 than the average speed of the object over the interval 1< t < 7? A) 1/24
B) 1/4
C) 4
D) 24

Ascientist has predicted that the population of earth will continue to grow exponentially until the year 2300. at that point, we will reach carrying capacity of earth’s resources, and population growth will plateau. if the scientist’s prediction is correct, what can you predict about human energy use at that time? justify your answer by explaining the relationship between population growth and energy use. (5 points)

Why is the road most slick when it first begins to rain? a. oils the road has absorbed begin to float. b. the water has not had time to run off. c. a higher concentration of dirt makes the road more slick. d. none of the above

Why did the strike at the pullman plant in chicago become a nationwide strike?