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 36 hours for 7 carpenters to frame a house, then how long will it take 63 carpenters to do the same job? Round to the nearest tenth when necessary.
A. 40 hours
B. 63 hours
C. 12.3 hours
D. 4 hours
Answer: D
Mathematics
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Express the number in scientific notation.0.000315
A. 3.15 × 10-3 B. 3.15 × 104 C. 3.15 × 10-4 D. 3.15 × 10-5
Mathematics
Complete.
= 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A flagpole is perpendicular to the horizontal but is on a slope that rises 10° from the horizontal. The pole casts a 43-foot shadow down the slope and angle of elevation of the sun measured from the slope is 36°. How tall is the pole? Round your answer to the nearest 0.1 foot.
A. 36.2 ft B. 35.4 ft C. 36.4 ft D. 33.5 ft
Mathematics
Write the number in trigonometric form. Let 0 ? ? < 2?.5
A. 5(cos 
+ i sin 
)
B. 5(cos 
+ i sin 
)
C. 5(cos 0 + i sin 0)
D. 5(cos ? + i sin ?)
Mathematics