Emma's plant grew 1/2 inch in one day. suppose the plant continues to grow at the same rate. how tall will it be in 5 weeks? justify your answer.

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%)