5 times what equals 22.5

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units

Consider the diagram. lines e and c can be described as