A ship headed due east is moving through the water at a constant speed of 10 miles per hour. However, the true course of the ship is 60°. If the currents are a constant 5.0 miles per hour, what is the ground speed of the ship?
?
Apply the rules regarding the use of significant digits after all computations are complete.
?
A. 9 mph or 7 mph
B. 8.7 mph
C. 6.7 mph
D. 7.7 mph or 6.7 mph
E. 7.7 mph
Answer: B
Mathematics
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Find the exact value of the expression.tan-1 (-
)
A. 
B. - 
C. - 
D. 
Mathematics
Solve the problem.The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millimeters). The linear model for this data is 
where x is temperature and y is growth in millimeters. Use this model to predict the growth of a plant if the temperature is 57. 
A. 25.43 mm B. 27.08 mm C. 27.54 mm D. 26.63 mm
Mathematics
Solve and check the linear equation.0.40(30) + 0.70x = 0.60(30 + x)
A. {30} B. {70} C. {50} D. {60}
Mathematics
Simplify the given expression.1160
A. 
B. 1
C. 160
D. undefined
Mathematics