How do you solve for a negative exponent? if i had 5 to the power of negative 2, how would i solve it?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

What is not true about kl and mn? what is mn? (show )