Solve the problem.Find the acute angle ? (in degrees) that satisfies the equation ? = tan-1 (1).
A. 45°
B. 180°
C. 0°
D. 90°
Answer: A
Mathematics
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Write the expression with positive exponents. Then simplify if possible.(-2)-4
A. - 
B. -16
C. 16
D. 
Mathematics
The equation has a solution r in the interval indicated. Approximate this solution correct to two decimal places.x4 - x3 - 7x2 + 5x + 10 = 0; -3 ? r ? -2
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.A boat goes 90 miles downstream in the same time it can go 60 miles upstream. The speed of the current is 4 miles per hour. Find the speed of the boat in still water.
A. 20 mph B. 16 mph C. 15 mph D. 24 mph
Mathematics
Use the multiplication property of inequality to solve the inequality and graph the solution set on a number line.-6x > 96
A. (-?, 16)
B. (-?, -16)
C. (-16, ?)
D. (16, ?)
Mathematics