Ryan opens a bank account with $50. each month he deposits an amount that doubles his savings. ryan gets $2 from the bank each month as an incentive for maintaining this savings pattern. which recursive function represents the amount in ryan's account in any month?
a: next = 2 x now + 2, starting at 50
b: next = 2 + 2, starting at 2
c: next = now + 2, starting at 50
d: next = 2 - now, starting at 50
e: next = 2 x now, starting at 2

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.