Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.
(log9 x + log9 y)
A. log9 
+ log9 
B. log9 
C. log9 
D. 
Answer: C
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Evaluate the integral.
A. 
[5 e6x sin 5x + 6 cos 5x] + C
B. 
[5 sin 5x - 6 cos 5x] + C
C. 
[5 sin 5x + 6 cos 5x] + C
D. 
[ sin 5x + cos 5x] + C
Change the number to polar form and then perform the indicated operations. Express the result in rectangular form.(- 
+ j)6
A. -64
B. -64
+ 64j
C. 64 - 64
j
D. 64j
Solve.A machinist who had been producing 50 parts per day increased output to 85 parts per day by using a faster machine. How many times faster is the new machine? Express your answer as a mixed number.
A. 1
times faster
B. 2
times faster
C. 2
times faster
D. 1
times faster
Use the indicated model of multiplication to illustrate the statement.(2 ? 3) ? 4 = 2 ? (3 ? 4); array model
A. (2 ? 3) ? 4 has four sets of blocks with 2 rows and 3 columns in each set.
4 sets of these
2 ? (3 ? 4) has two sets of blocks with 3 rows and 4 columns in each set.
2 sets of these
B. (2 ? 3) ? 4 has six sets of blocks with 1 column and 4 rows in each set.
6 sets of these
2 ? (3 ? 4) has 12 sets of blocks with 1 column and 2 rows in each set.
12 sets of these