Solve the problem. Round your answer to the nearest tenth, if necessary.Bill can row 3 mph in still water. It takes him 3 hr 36 min to go 3 mi upstream and then return. Find the speed of the current.

A. 2.5 mph
B. 2 mph
C. 3 mph
D. 1.5 mph


Answer: B

Mathematics

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Write the exponential expression with positive exponents. Simplify if possible.

A. 644/3 = 256
B. 64-4/3 = - 
C. -644/3-256
D. 64-4/3 = 

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Solve the polynomial inequality. Express the solution using interval notation.x3 ? -10x2 - 25x

A. (-?, 0] B. [-5, 0] C. (-?, 0] ? [5, ?) D. (-?, -5] ? [0, ?)

Mathematics

Add. Simplify, if possible. + 

A.
B.  
C.  
D.  

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Use interval notation to represent all values of x satisfying the given conditions.y1 = -2x + 1, y2 = -3x - 4, and y1 ? y2.

A. [-5, ?) B. (-?, -5] C. [-3, ?) D. (-?, -5)

Mathematics