Suppose an investment of $3,800 doubles in value every decade. the function f(x) = 3,800 * 2^2 gives the value of the investment after x decades. how much is the investment worth after 2 decades?
a. $152,000
b. $15,200
c. $76,000
d. $7,600

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.