Write the expression using only the indicated logarithms.log5 (x + y) using natural logarithms
A. ln (x + y) + ln 5
B. 
C. ln (x + y) ln 5
D. 
Answer: D
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Factor completely. If unfactorable, indicate that the polynomial is prime.3x2(x - 4) + 24x(x - 4) + 45(x - 4)
A. 3(x + 3)(x + 5)(x - 4) B. (x - 4)(-4x + 9)(x + 5) C. (x - 4)(3x + 15)(x + 3) D. 3(x - 4)(x - 3)(x + 5)
Use the even-odd properties to find the exact value of the expression. Do not use a calculator.sin (-60°)
A. 
B. 
C. - 
D. - 
Solve the problem.The intensity of light from a light source varies inversely as the square of the distance from the source. Suppose the the intensity is 40 foot-candles at a distance of 10 feet. What will the intensity be at a distance of 22 feet? Round your answer to the tenths place.
A. 8.5 foot-candles B. 7.7 foot-candles C. 8.3 foot-candles D. 8.0 foot-candles
Simplify the exponential expression. Write any negative exponents as positive exponents. Assume all variables represent positive real numbers.(-27)4/3
A. not a real number B. 729 C. -81 D. 81