The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.The pH value of a substance is 5.42. Find the hydrogen-ion concentration for this substance.
A. 263,026.8
B. 1.7
C. 0.2
D. 0.0000038
Answer: D
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Solve.The table shows the number of restaurants in five different cities. CityNumber of Restaurants Carlsbad 456 Potters Vale 254 Little Heath 241 Edgbaston 221 Barrow 310How many more restaurants are there in Carlsbad than in Barrow?
A. 456 B. 235 C. 766 D. 146
Solve the problem.You just put $2277 in a CD that is expected to earn 5% compounded monthly, and 
in a savings account that is expected to earn 2% compounded annually. Determine when, to the nearest year, the values of your two investments will be the same.
A. 19 years B. 62 years C. 48 years D. 34 years
Find the distance d(P1, P2) between the points P1 and P2.P1 = (-0.4, 0.5); P2 = (-2.2, 2.8) Round to three decimal places, if necessary.
A. 3.021 B. 2.921 C. 9.236 D. 20.5
Find an equation in slope-intercept form (where possible) for the line.Through (5, 3), m = - 
A. y = 
x + 
B. y = - 
x + 
C. y = - 
x + 
D. y = 
x - 