Solve.When a single card is drawn from an ordinary 52-card deck, find the probability of getting a red card.
A. 
B. 
C. 
D. 2
Answer: B
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A. no solution; ? B. {(3, 1)} C. {(1, 3)} D. {(2, 14)}
Parallel beams of similarly charged particles are shot from two atomic accelerators L = 28 meters apart, as shown in the figure below. If the particles were not deflected, the beams would be 
meters apart. However, because the charged particles repel each other, the beams follow the hyperbolic path 
/>, for some k. Find k.
?
?
A. k = 3.78 × 10 -3
B. k = 1.89 × 10 -3
C. k = 1.89
D. k = 1.89 × 10 -6
E. none of these
Convert. When necessary, round the answer to two decimal places.9 tons = ____ pounds
A. 9000 B. 18,000 C. 144 D. 1800
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last the specified period of time.Between 540 hours and 780 hours
A. 2217 B. 1710 C. 2215 D. 1717