Yes, it will always be a rational number. I'll expound on this by defining what a rational number is. It is any number that can be expressed as a fraction. Otherwise, it is called an irrational number with a non-terminating decimal expansion. So, although 1/3 has a non-terminating decimal expansion because it is equal to 0.33333333...., it is still a rational number because it can be expressed into a fraction.
C and d is indubitably correct
3: -27
4: 81
5: -243
All you need to do is plug in the numbers into the exponent spot.
B is plus square so you would add
