Two tanks each contain 100 liters of a mixture. Initially, the mixture in tank A contains 40 grams of salt while tank B contains 20 grams of salt. Liquid is pumped in and out of the tanks as shown in the accompanying figure. Determine the amount of salt in each tank at time t. Mixture 16 L/min Mixture 12 L/min Mixture 4 L/min Water 12 L/min B 100 L A 100 L

MATH121 Chapter 7 Notes Lesson 7.1 – Exponential Functions and their Graphs EXAMPLE 1. x 16 – 4 = 0 (First, we need to get the nomial with the exponent on a side by itself, so add 4 to both sides.) x 6 = 4 (Now, we need to get both numbers with the same base so we can set the exponents equal to one another. 16 is the same as 2 . 4 is the same as 2 .) 4x