3. a snowmobile manufacturer claims that its newest model is 15% lighter than last year’s model. if this year’s model weighs 799 lb., how much did last year’s model weigh?

Given the statements, "a square root of 16 is 4," and "a square root of 9 is -3," complete the following blanks with the correct truth-values. p is and q is , so the statement, "a square root of 16 is 4 or a square root of 9 is -3" is .

Factor this polynomial completely x^2-64

How to do this , and can some one explain