Solve the problem.A car travels 400 miles on level terrain in the same amount of time it travels 160 miles on mountainous terrain. If the rate of the car is 30 miles per hour less in the mountains than on level ground, find its rate in the mountains.
A. 40 mph
B. 80 mph
C. 50 mph
D. 20 mph
Answer: D
Mathematics
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Solve the problem.A rectangular yard is designed to have an area of 
Express the perimeter P as a function of the width w. Find 
P by evaluating the function for the following values of w (in m): 24.9, 24.99, 24.999, 25.1, 25.01, 25.001.
A. 115.1 m B. 57.8 m C. 115.7 m D. 115.6 m
Mathematics
Solve the problem.Show that the vectors 
b + 
a and 
b - 
a are orthogonal.
What will be an ideal response?
Mathematics
Write the quotient in standard form.
A. -1 B. 1 C. -i D. i
Mathematics
Insert either <, >, or = to make a true statement.
_____ -8
A. < B. = C. >
Mathematics