Solve.
+ 
= 4
A. 2, -2
B. -2
C. 0
D. 
, -2
Answer: B
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State whether you think the difference between what occurred and what you would expect by chance is statistically significant.You draw a card at random from a deck of cards and replace it. You repeat this 100 times and get an ace 40 times.
A. Statistically significant B. Not statistically significant
Evaluate the integral.
A. 
?(15? - 16)
B. 
?(15? - 8)
C. 
?(15? - 8)
D. 
?(15? - 16)
Solve the problem.In how many ways can 8 people be chosen and arranged in a straight line, if there are 12 people from whom to choose?
A. 11,880 B. 23,760 C. 19,958,400 D. 96
Estimate. Then find the actual quotient.31.40 ÷ (-0.001)
A. Estimate: -3000; Actual: -3140 B. Estimate: -30,000; Actual: -31,400 C. Estimate: -300,000; Actual: -314,000 D. Estimate: -300; Actual: -314