Multiply and then, if possible, simplify by factoring.
A. 
B. 21x + 49
C. 
D. 
Answer: C
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Find the indicated cardinal number.Find n(A × B) given that n(A) = 40 and n(B) = 7.
A. 47 B. 33 C. 54 D. 280
Solve the problem.A boat is sailing directly toward a lighthouse that is 90 ft tall. The angular size ? of the lighthouse is the angle formed by the lines from the top and bottom of the lighthouse to the observer on the boat, as shown in the figure. What is the rate of change of the angular size d?/dx when the boat is 300 feet from the lighthouse?
A. -0.00010 rad/ft B. 0.00526 rad/ft C. -0.00917 rad/ft D. -0.00092 rad/ft
Solve the equation.
x - 
x = 2
A. {30} B. {60} C. {-30} D. {-60}
In order to prepare her budget, Sue gathers receipts for all major expenses she has had over the last month. Round the figure to the nearest dollar.Car payment, $465.48
A. $465 B. $465.48 C. $465.50 D. $466