If any number to the zero power is the does that make 31 to the zero power 1 or 31?

Is there an x intercept in the equation 60*1.15^x

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

What number is 7 units left of -15?