Determine the number and type of real solutions of the equation. −x^2+4x−4=0
No Real Solution, Two Real Rational Solutions, Two Real Irrational Solutions, One Real Rational Solution, or One Real Irrational Solution.

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

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Icould really use some with this question.