the radius of a cycle wheel is 35 cm. Find the number of turns required to cover a distance of 1540 m

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

What is the correlation coefficient for the data? don't forget to turn the diagnoisticon (in the catalog menu of the calculator). r = answer (round to the nearest thousandth)

(! ) three cylinders have a height of 8 cm. cylinder 1 has a radius of 1 cm. cylinder 2 has a radius of 2 cm. cylinder 3 has a radius of 3 cm. find the volume of each cylinder