Unit 5 Lesson 4 Homework Given the following exponential equations, determine the initial value, the growth factor, the resulting value hen x = 6. ) y = 3(4) * b) y = 0.25(2) * c) y = 250(3) * d) y = 12(1)x 2: Create an exponential equation, given the following pieces of information: a) starting with 19 bacteria that triple b) starting with 4 ostriches that double in number every three hours in number every year c) starting with 10 000 transistors that d) starting with 0.1 ounces of yeast that quadruple double in number every two years in amount every 20 minutes 3: The growth of a colony of bacteria, which doubles every 4 hours, follows this exponential equation: y = 8(2)". a) How many bacteria are present initially? b) What is the growth rate of the bacteria? c) How many bacteria will there be in 8 hours? 16 hours? 24 hours? 4: The use of cellphones has grown exponentially in the last decade; in fact, it doubles every two years. If the 2014? initial number of cellphone users on the planet was 200 million in 2006, how many cellphone users were there in Answers: 1) a) a = 3, b = 4, y = 12288 2) a) y = 19(3) b) y = 4(2) b) a = 0.25, b = 2, y = 16 c) a = 250, b = 3, y = 182 250 d) a = 12, b = 1, y = 12 3) a) 8 bacteria c) y = 10 000(2)" b) doubles d) y = 0.1(4) c) 32 bacteria, 128 bacteria, and 512 bacteria 4) 3.2 billion users