Write the expression in the standard form a + bi.2i(3 - 4i)
A. 6i + 8i2
B. 6i - 8i2
C. 8+ 6i
D. 6i- 8
Answer: C
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Convert the given interest rate to decimal form if it is given as a percentage, and to a percentage if it is given in decimal form.0.05% to decimal
A. 0.5 B. 5.0 C. 0.05 D. 0.0005
Find the indicated probability. A bag contains 17 balls numbered 1 through 17. What is the probability that a randomly selected ball has an even number?
A. 
B. 
C. 
D. 
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in black on a light gray background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix which represents the negative image of the picture represented by A.
A. 
B. 
C. 
D. 
Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table.
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 8 months B. 12 months C. 20 months D. 10 months