#9,11,15

7.Solve logx 8 = - NIN a. -16 b.-64 c.1/64 d.4 8. Evaluate:3 log: 24 - 3 log: 3 a. 3 b.1 C.7 d) 64 9. Which does not help to explain why you cannot use the laws of logarithms to expand or simplify log4 (3y - 4)? a.) The expression 3y - 4 cannot be factored. b.) The expression 3y - 4 is not raised to a power. c.) 3y and 4 are neither multiplied together, nor are they divided into each other d) Each term in the expression does not have the same variable. 10. Solve log( x + 3) + log( x) = 1. . C(an a. -5,2 b. 2 C. 7 d. 10 11. A radioactive substance has a half-life of 7 h. If a sample of the substance has an initial mass of 2000, Estimate the instantaneous rate of change in mass 1.5 days later. a. -5.6/h b. -56g/h c. -707g/h d.-0.845g/h 12. Evaluate logm (man). a) m b) mn c) n2 d) 2n 13. Determine the equation of the asymptote for the graph of y = 210g; (2x +4)-1. a) x=-1 b) x =-2 c) x =4 d) x =4 14. Which logarithmic equation correctly represents the exponential equation ex = 7? a) x = In 7 b) x = In 10 c) 7 = Inx d) 10 = In x 15. Which of the following statements will NOT be true regarding the graphs of: f(x) = log3(3x), f(x) = log3(9x), f(x) = 10g3 3 a) They will have the same vertical asymptote b)They will have the same x intercept c) They will curve in the same direction d) They will have the same domain. 16. Which exponential equation correctly represents the logarithmic equation y = log 50? a)50% = 10 b) 10% = 50 cly10 = 50 d) y50 = 10