What is the trigonometric function's period?

question 3 options:

pi

2 pi

3 pi

4 pi

Will gve pints stars and brainliest

What is the radius of the cone in the diagram? round your answer to the nearest whole number

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%)