Simplify the fraction.
?
?
Assume that the denominator is not 0.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: B
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The figure shows the percentage of the U.S. population, f(x), made up of teachersas a function of time, x, where x is the number of years after 1900. Use the graph to solve the problem. 
In which year did the percentage of teachers in the U.S. reach a minimum?
A. 2000 B. 1900 C. 1970 D. 1990
Solve the problem.Estimate the answer by rounding each number to the nearest hundred.943 - 672
A. 300 B. 271 C. 270 D. 200
Solve the problem.Island A is 150 miles from island B. A ship captain travels 250 miles from island A and then finds that he is off course and 160 miles from island B. What angle, in degrees, must he turn through to head straight for island B? Round the answer to two decimal places. (Hint: Be careful to properly identify which angle is the turning angle.)
A. 110.17° B. 145.08° C. 34.92° D. 55.08°
Simplify the expression. Assume that all variables are positive when they appear.
? 
A. 266xy
B. 
C. 
D. 