Write the expression with positive exponents. Then simplify if possible.-3-4
A. 
B. - 
C. -81
D. 81
Answer: B
Mathematics
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Find the length of the hypotenuse.
A. 16 B. 110 C. 26 D. 25
Mathematics
Solve.
= 5
A. 30 B. 20 C. 100 D. 25
Mathematics
Write the set as indicated.Write {2} using set-builder notation.
A. {x?x is all natural numbers} B. {x is a constant} C. {x} D. {x?x is the natural number 2}
Mathematics
Solve.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 5.21 B. 5.79 C. 6.21 D. 6.79
Mathematics