Which equation would best solve the following problem?

rita hits a tennis ball with an initial velocity of 15 meters/sec. when she hits the ball, it is one meter above the ground. how long will it take for the ball to hit the ground?
question 1 options:

–16t^2+ 15t + 1 = 0

–4.9t^2 + 15t = 1

–4.9t^2 + 15t + 1 = 0

4.9t^2 + 15t + 1 = 0

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

Given the sequence 7, 14, 28, 56, which expression shown would give the tenth term? a. 7^10 b. 7·2^10 c. 7·2^9

You have a square piece of cardboard that measures 14 inches on each side. to build a box, you cut congruent squares out of each corner of the cardboard. use the picture to find the area of the cardboard you were used to build the box