Hello! I need help studying this questions! Please show solution for explanation!

Solve using a graphing calculator. (No work to be shown - only for question 7.) 7) log=(3x - 15) - 8 = log3(x + 4) + log3(x - 1) 13) 2.14 The amount bacteria (in thousands) found on the beach has been steadily declining. Scientists want to create a regression model to show the number of bacteria as a function of years. Year 2 4 Bacteria (in 9.9 7.8 6.7 5.8 thousands) a) What's a logarithmic regression equation that could model this situation? b) How many years until there are 2 thousand bacteria in a sample on the beach? c) How many bacteria can be found in a sample after 6 years