Simplify the factorial expression.
A. 
B. 
C. 2!
D. 30
Answer: B
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Solve the problem.A person plans to invest a total of $70,000 in a CD at 4% annual interest and a mutual fund that has a 3-year average annual interest of 10%. Let x and y represent the money (in dollars) invested in the CD and the mutual fund, respectively. How much money should be invested in each account to earn a total of $4000 in one year?
A. $40,000 invested at 4%; $30,000 invested at 10% B. $20,000 invested at 4%; $50,000 invested at 10% C. $30,000 invested at 4%; $40,000 invested at 10% D. $50,000 invested at 4%; $20,000 invested at 10%
Solve the problem.All 33 of the students in a mathematics class attended class on Monday. On Tuesday only 27 students attended. What was the percent decrease?
A. 81.8% B. 18.2% C. 77.8% D. 22.2%
Evaluate the integral.
A. 4
i + 5
j
B. 0
C. 5
i
D. 4
i
Solve the system.
A. x = 4, y = 1, z = 2 B. x = 4, y = 2, z = 1 C. x = 1, y = 2, z = 4 D. x = 1, y = 4, z = 2