Amir drove from jerusalem down to the lowest place on earth, the dead sea, descending at a rate of 121212 meters per minute. he was at sea level after 303030 minutes of driving.
graph the relationship between amir's altitude relative to sea level (in meters) and time (in minutes).

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)