Two cars leave an intersection at the same time, one traveling west and the other, north. Four seconds later the westbound car is is 18 ft from the intersection and traveling at 9 ft/sec while the northbound car is 30 ft from the intersection and traveling at 14 ft/sec. Find the rate at which the distance between the two cars is changing at this instant.

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean