Solve the problem.There are 3 cards in a hat; one is a king, one is a queen, and one is an ace. Two cards are to be selected at random with replacement. Using a tree diagram , obtain the sample space for the experiment. List the elements that make up the sample space.
A. K K Q , K A K, Q Q Q, K Q , A A K
B. K Q , K A, Q K, Q A, A K, A Q
C. K K, K Q , K A, Q K, Q Q, Q A, A K, A Q, A A
D. K K, K Q , K A, Q Q, Q A, AQ, A A
Answer: C
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Answer the question asked. When necessary, round to the nearest hundredth.A car travels 400 miles on level terrain in the same amount of time it travels 160 miles on mountainous terrain. If the rate of the car is 30 miles per hour less in the mountains than on level ground, find its rate in the mountains.
A. 50 mph B. 80 mph C. 40 mph D. 20 mph
Graph the function.f(x) = 
A. 
B. 
C. 
D. 
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find sin 
.
A. - 
B. 
C. 
D. - 
Solve the problem.During the first five months of the year, Len earned commissions of $3980, $2430, $2450, $2450, and $2370. If Len must have average monthly earnings of at least $2620 in order to qualify for retirement benefits, what must he earn in the sixth month in order to qualify for benefits?
A. at least $2040 B. at least $2736 C. at least $2620 D. at least $2716