Find the probability.An urn contains balls numbered 1 through 20. A ball is chosen, returned to the urn, and a second ball is chosen. What is the probability that the first and second balls will be a 7?
A. 
B. 
C. 
D. 
Answer: C
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Provide an appropriate response.What two angles of elevation will enable a projectile to reach a target 
downrange on the same level as the gun if the projectile's initial speed is 
Assume there is no wind resistance.
A. 0.02° and 89.98° B. 22.56° and 67.44° C. 22.56° D. 45.12° and 44.88°
Solve the problem.A woman has $1.70 in dimes and nickels. She has 2 more dimes than nickels. How many nickels does she have?
A. 14 nickels B. 10 nickels C. 8 nickels D. 12 nickels
Find the exact value of the indicated trigonometric function of ?.cot ? = - 
, cos ? < 0Find csc ?.
A. 
B. - 
C. - 
D. 
Use mathematical induction to prove the statement is true for all positive integers n.The integer n3 + 2n is divisible by 3 for every positive integer n.
What will be an ideal response?