Solve the problem.The time it takes to complete a certain job varies inversely as the number of people working on that job. If it takes 24 hours for 13 carpenters to frame a house, then how long will it take 30 carpenters to do the same job? Round to the nearest tenth when necessary.
A. 30 hours
B. 16.3 hours
C. 10.4 hours
D. 40 hours
Answer: C
Mathematics
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Simplify.i26
A. -1 B. 1 C. -i D. i
Mathematics
Solve the problem.The Richter Scale measures the magnitude M of an earthquake. An earthquake whose seismographic reading measures x millimeters 100 kilometers from the epicenter has magnitude M given by M(x) = log 
. Give the magnitude of an earthquake that resulted in a seismographic reading of 97,731 millimeters 100 kilometers from its epicenter.
A. 8.0 B. 7.0 C. 9.0 D. 2.0
Mathematics
Solve using Cramer's rule.
A. (-4, 3) B. (3, 4) C. (4, 3) D. (-3, -4)
Mathematics
Find the measure of the indicated exterior angle in the triangle, when 
.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics