Solve the logarithmic equation.log15(x + 30) = 3 - log15x
A. {-45}
B. {75}
C. {-75}
D. {45}
Answer: D
Mathematics
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Solve the problem.The number of hours of darkness in a coastal town can be modeled by 
, where x is the month and 
corresponds to January. Approximate the number of hours of darkness in April, to the nearest tenth of an hour.
A. 22.4 hours B. 14.8 hours C. 17.9 hours D. 17.1 hours
Mathematics
Find the composite function for the given functions.g ? f for f(x) = 4x2 + 3x + 8 and g(x) = 3x - 4
A. 12x2 + 9x + 28 B. 4x2 + 9x + 20 C. 12x2 + 9x + 20 D. 4x2 + 3x + 4
Mathematics
Use the dot product to find the magnitude of u.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Write an equivalent exponential equation.log10 10,000,000 = 7
A. 107 = 10,000,000 B. 10,000,00010 = 7 C. 10,000,0007 = 10 D. 710 = 10,000,000
Mathematics