NEED HELP ASAP!!Which one of the following functions is an exponential decay function? A.) f(x) = 3x - 8

B.) f(x) = -2x + 4

C.) f(x) = -x2 - 5

D.) f(x) = 2(0.25)* + 1

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Write the equation in logarithmic form e^x=403.429

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.