Suppose an investment of 1,800 doubles in value every 7 years. how much is the investment worth after 42 years?

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Prove the following(cot0+cosec0)[tex](cot0 + cosec0) { }^{2} = \frac{1 + cos0}{1 - cos0} [/tex]