If a to the first power equals five and a the the n power equals a to the n-1 power then what is the value of a to the fourth power

Simplify the expression. enter the correct answer.

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol