What happens to the rate of change of the logarithmic function y = loga x as a becomes larger?

The amount of money in an investment is modeled by the function A(t) = 650(0.7969)'. The variable A represents the investment balance in dollars, and t the number of years since 2001. (A) In 2001, the balance was $ (B) The amount of money in the investment is increasing exponentially (C) The annual rate of change in the balance is r = or r = %. (D) In the year 2009 the investment balance will equal Round answer to the nearest penny. %24

A professor surveyed students on their study habits, where "x" is the number of hours studying and "y" is the resulting test score. Using a logarithmic regression, predict the number of hours needed to score 95.   (Graph and equation in picture provided)

where / is the amplitude registered on a seismograph 100 km from the epicenter of K The magnitude of an earthquake, measured on the Richter scale, is log 107 the earthquake, and lo is the amplitude of a certain (small) size. Find the Richter scale rating for an amplitude of 100,000,000/- The magnitude, R (measured on the Richter scale) is.