Can you me with any of these questions? (images attached)

Write the fraction or mixed number and the decimal shown by the model

Select the lengths in centimeters that would form a right triangle

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%)