How can i write the product of 13 ×13 ×13×13 using an exponent

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

The radius of a sphere is 3 inches. which represents the volume of the sphere?