Use a proportion to solve the problem.The ratio of the lengths of strings that play the notes D and A is 3 to 2. If a string 54 centimeters long plays a D, what is the length of the string that plays an A?
A. 57 centimeters
B. 36 centimeters
C. 56 centimeters
D. 81 centimeters
Answer: B
Mathematics
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Place the correct symbol, < or >, in the blank between the whole numbers.34,010 
34,101
A. > B. <
Mathematics
Solve the problem.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 200 mph B. 40 mph C. 80 mph D. 160 mph
Mathematics
Graph the polar equation.r = 4 sin 2?
A. 
B. 
C. 
D. 
Mathematics
In how many ways can a seven-question true-false exam be answered? (Assume that no questions are omitted.) ?
A. 138 B. 128 C. 133 D. 118 E. 123
Mathematics