Nour drove from the Dead Sea up to Amman and her altitude increased at a constant rate. When she began driving her altitude was 400 meters below sea level. When she arrived in Amman 2 hours later her altitude was 1000 meters above sea level.

What is the equation for the relationship between the altitude and the number of hours

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.

Pls brainliest will be awarded if answer is correct

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?