Lisa is standing on a dock beside a lake. she drops a rock from her hand into the lake. after the rock hits the surface of the lake, the rock's distance from the lake's surface changes at a rate of −5 inches per second. if lisa holds her hand 5 feet above the lake's surface, how far from lisa's hand is the rock 4 seconds after it hits the surface?

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Solve the equation x/4 - 5= -8 -27 -12 -7 12

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?