Can someone explain to me how to use "squared"? i do 2+2 and its four. but when i do 3+3 and i get 6, my brother tells me that's not squared. can you me out?

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625