Express as a sum of logarithms.logr 8T
A. log 8 + log T
B. log7 r + logT r
C. logr 8 + logr T
D. logr 8 + logr T + logr r
Answer: C
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Decide whether or not the given equation is an identity.2 cos4 x - 3 cos2 x + 1 = sin2 x(2 cos2 x - 1)
A. Yes B. No
Solve the problem.A certain radioactive isotope decays at a rate of 1% per 400 years. If t represents time in years and y represents the amount of the isotope left, use the condition that 
to find the value of k in the equation 
A. -0.01005 B. 0.00003 C. 0.00673 D. -0.00003
Find all numbers that are not in the domain of the function. Then give the domain using set notation.f(x) = 
A. 
; 
B. - 
; 
C. none; (-?, ?)
D. - 
, -1; 
A new car dealership has taken an inventory of the vehicles it has in stock. Below is a histogram indicating the number of vehicles in stock in certain price ranges. Use the histogram to answer the question.
How many vehicles does the dealership have in stock that are priced at $28,000 or over?
A. 6 vehicles B. 30 vehicles C. 25 vehicles D. 5 vehicles