How to find the value of each power

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Two numbers have a sum of 93. if one number is p, express the other number in terms of p.

Larger pets need to be transported in larger portable kennels. using a graphing calculator and the relationship between the width, length, and height, find the dimensions of a portable kennel whose volume is 7.4 ft3. the dimensions of a portable kennel can be expressed as width x, length x + 0.4, and height x − 0.2? what are the dimensions of a portable kennel with a volume of 7.4 ft3? use a graphing calculator to solve. round the dimensions to the nearest tenth.