Solve the problem.From a 
-pound package of ground beef, a 
-pound hamburger was made. How much ground beef is left in the package?
A. 
lb
B. 
lb
C. 
lb
D. 
lb
Answer: C
Mathematics
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Solve the problem.A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school will take longer than 335 seconds to run the mile.
A. 0.9893 B. 0.4893 C. 0.5107 D. 0.0107
Mathematics
Evaluate the integral.
A. 74.6 B. 53.6 C. 6.70 D. 12.64
Mathematics
Solve the equation.
- 
= 0
A. ? B. {-3, 4} C. {8, 4} D. {4}
Mathematics
Perform the indicated operation.(3n5 - 5n2 - 17) - (15n2 + 9n5 + 4)
A. -6n5 - 20n2 - 21 B. -47n7 C. -6n5 + 4n2 - 13 D. -6n5 - 20n2 - 13
Mathematics