Determine if the function is a solution to the given differential equation.y = 4e2x + xe2x; y'' - 2y' + 1 = 0.
A. No
B. Yes
Answer: A
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Find the slope of a straight line that passes through the given pair of points.(6, 7) and (-5, -9)
A. - 
B. 
C. 
D. - 4
Use the given information to write an equation. Let x represent the number described in the exercise. Then solve the equation and find the number.seven more than a number is equal to twelve.
A. x = 12 + 7, x = 19 B. x + 7 = 12, x = 5 C. 7 - x = 12, x = -5 D. 7 + x = 12, x = -5
Solve the problem.A local community college has 3206 students with 862 freshmen, 813 sophomores, 787 juniors, and 744 seniors. What is the relative frequency of sophomores at this college?
A. 25.4% B. 23.2% C. 24.5% D. 26.9%
Use the pH scale to solve the problem. Negative ions, designated by the notation [OH-] are always present in any acid or base. The concentration, [OH-], of these ions is related to [H+] by the equation [OH-] ? [H+] = 10-14 moles per liter. Find the concentrations of [OH-] and [H+] in moles per liter for the substance with the following pH value. Round to two decimal places. pH = 12.2
A. [H+] = 6.31 × 10-13 [OH-] = 1.58 × 10-2 B. [H+] = 1.58 × 10-13 [OH-] = 6.31 × 10-3 C. [H+] = 6.31 × 10-11 [OH-] = 1.58 × 10-3 D. [H+] = 1.58 × 10-2 [OH-] = 6.31 × 10-13