Write the mixed number as a fraction or the fraction as a mixed number

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Hey hotel charges guests $19.75 a day to rent five video games at this rate which expression can be used to determine the charge for renting nine video games for one day at this hotel? pls

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.