HELP ME WITH THIS PLs!

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

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.