30 Points. Please help. And please hurry

An ant travels at a constant rate of 30cm every 2 minutes. at what speed does the ant travel per minute

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%)

Describe the graph of 3x+2> 2 and 3x< 6