The cost, in dollars, of making n smoothies, for n≥1, is represented by the sequence shown. 12, 15, 18, 21, 24, 27, ...
Complete the recursive formula for this sequence for n≥1, and determine the initial value when n=1.

f(n+1)=
f(1)=

The graph below could be the graph of which exponential function?

1. what are the missing reasons in the proof 2. it's in the second picture and 3

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years