Use the formula B = P
nt, which is used to calculate the final balance of an investment or a loan after being compounded. Following is a list of what each variable represents:B represents the final balance.P represents the principal.r represents the annual percentage rate.t represents the time in years in which the principal is compounded.n represents the number of times the principal is compounded in a year.Sheila invests $20,000 in an account that is compounded semiannually. If, after one year, her balance is $22,472, what is the interest rate of the account?
A. 11%
B. 13%
C. 10%
D. 12%
Answer: D
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Write the inverse of the statement.If the moon is out, then we will start a campfire and we will roast marshmallows.
A. If the moon is not out, then we will not start a campfire or we will not roast marshmallows. B. If the moon is not out, then we will start a campfire but we will not roast marshmallows. C. If we do not start a campfire or we do not roast marshmallows, then the moon is not out. D. If we start a campfire and we roast marshmallows, then the moon is out.
Find the probability.One card is selected from a deck of cards. Find the probability that the card selected is greater than 2 and less than 7.
A. 
B. 
C. 
D. 
Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. 
Make an appropriate substitution in order to obtain a quadratic equation. Find all complex values for x. (x2 - 3x)2 - 14(x2 - 3x) + 40 = 0
A. x = - 1, - 2, 4, 10, 4, 5 B. x = 4, 5 C. x = - 1, - 2, 4, 5 D. x = 4, 10