A circle has a radius of 5.4m. What is the exact length of an arc formed by a central angle measuring 60°. Enter your answer in the box. Express your answer using pi

Could somebody me with this radical simplification?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?