Solve the problem.Suppose that 12% of the teachers at a university attended a conference. If 720 teachers attended the conference, how many teachers are at the university?
A. 72 teachers
B. 72,000 teachers
C. 7200 teachers
D. 6000 teachers
Answer: D
Mathematics
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A set of data items is normally distributed with a mean of 500. Find the data item in this distribution that corresponds to the given z-score.z = 1.5, if the standard deviation is 10.
A. 550 B. 505 C. 510 D. 515
Mathematics
Simplify.18 ÷ [3 ? (-30 ÷ (-5))]
A. 1 B. -1 C. -6 D. -3
Mathematics
Solve.Jorge has a total of 66 coins in a jar, all of which are either dimes or nickels. The total value of the coins is $6.05. If n represents the number of nickels Jorge has, solve the following equation to find the number of nickels in the jar.
A. 13 nickels B. 11 nickels C. 16 nickels D. 55 nickels
Mathematics
Find the part.8.0% of 1100 hours
A. 9 hours B. 880 hours C. 88 hours D. 8800 hours
Mathematics