Simplify the given expression.13t + 10t
A. 23t2
B. 23t
C. 
t
D. 3t
Answer: B
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Rewrite the trigonometric expression as an algebraic expression involving the variable u. Assume that 
and that the value of the "inner" inverse trigonometric expression represents an angle ? such that 
tan (sin-1 u)
A. 
B. 
C. 
D. 
Add or subtract. Express the answer as a mixed number.
A. 7
B. 8
C. 7
D. 6
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00
Solve the problem by integration.Under specified conditions, the time t (in min) required to form x grams of a substance during a chemical reaction is given by 
Find the equation relating t and x if x = 0 g when 
A. t = 
ln 
+ 
ln 3
B. t = 
ln 
- 
ln 
C. t = 
ln 
+ 
ln 
D. t = 
ln 
- 
ln 3