Use the properties of logarithms to write the following expression as a single logarithm with a coefficient of 1.
?
What will be an ideal response?
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Convert to years, expressed in decimal form to the nearest hundredth when necessary.19 months
A. 228 years B. 1.58 years C. 1.9 years D. 1.73 years
Use the properties of the trigonometric functions to find the exact value of the expression. Do not use a calculator.cos 65° sec 65°
A. -1 B. 0 C. 1 D. 65
Use the substitution method or the elimination method to solve the system. If the system has infinitely many solutions, express the ordered pair in terms of x or y.
x + 
y = 4
x + 
y = 2
A. 
or 
B. 
C. no solution
D. (0, 12)
Solve the problem.Suppose a cost-benefit model is given by y = 
, where y is the cost for removing x percent of a given pollutant. What percent of pollutant can be removed for $30,000? Round your answer to the nearest tenth of a percent.
A. 502.2% B. 91.0% C. 9.1% D. 111.0%