Question: * +5 19. Solve: 701 =62 6 Give the solution to the nearest hundredth. a. 1 - 3.65 C. 1 - 111 83 1 =

* +5 19. Solve: 701 =62 6 Give the solution to the nearest hundredth. a. 1 - 3.65 C. 1 - 111 83 1 = 3.66 d. 1 4-1.34 20. The PH scale measures the acidity or alkalinity of a solution, A solution that has a pl of 7 is neutral. For each increase of 1 pH, a solution is 10 times as alkaline. For each decrease of 1 pH, a solution is 10 times as acidic. A sample of juice has a pH of 4.1. A sample of milk has a pH of 6.6. To the nearest whole number, how many times as acidic as the milk is the juice? a. 2 times as acidic c. 130 times as acidic b. 16 times as acidic d. 316 times as acidic 21. Solve the equation: 2 In x = In(31 + 18) a. 1 = 6 b. * = 2 C. 1 =9 d. 1=3 D 22. Solve the equation: 10 In x2 - 3 = . Write the solution to the nearest thousandth. ERROR a. 1 = 1,948 1 = 12.226 C. 1 = +1.868 d. 1 = $1.284 23. The amount of investment in an account with continuously compounded interest is given by the formula 4 - A, ed, where d, is the principal, r is the annual interest rate, and : is the time in years. If an amount of A= Aert money was invested with an annual interest rate of 3.2%, how long would it take for the investment to double? Write the answer to the nearest tenth. a. 0.7 years b. 21.7 years c. 2.2 years d. 3.9 years 24. The half-life of a radioactive substance is the time it takes for half of the substance to decay. Polonium-210 has a half-life of approximately 138 days. Suppose a laboratory has a 31 g sample of polonium-210. How much polonium is in the sample after 1 104 days? Write the answer to the nearest hundredth if necessary a. 3.88 g b. 5.86 g c. 0.06 g d. 0.12 g

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