Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?
A. $300,000
B. $360,000
C. $60,000
D. $218,400
Answer: D
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Find all specified roots.Seventh roots of 1.
A. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
B. -1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
C. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
D. 1, cis 
, cis 
, cis 
, cis 
, cis 
, cis 
, -1
If possible, simplify the expression. If any variables exist, assume that they are positive.
- 
A. -1
B. 0
C. -6
D. - 
Translate the phrase into an expression involving addition, then simplify.-56 added to 18
A. 74 B. 38 C. -38 D. -74
Solve the problem.An initial investment of $12,000 is appreciated for 3 years in an account that earns 6% interest, compounded quarterly. Find the amount of money in the account at the end of the period.
A. $14,135.39 B. $14,292.19 C. $2347.42 D. $14,347.42