What is the value of K ?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?

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%)