Solve the differential equation using the method of variation of parameters.
y" + 25y = x
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A function f(x), a point x0, the limit of f(x) as x approaches x0, and a positive number ? is given. Find a number 
such that for all x, 0 < 
< ? ? 
< ?.f(x) = 8x - 9, L = 15, x0 = 3, and ? = 0.01
A. 0.00125 B. 0.003333 C. 0.000625 D. 0.0025
Write the indicated statement. Use De Morgan's Laws if necessary.If I pass, I'll party.Contrapositive
A. I'll party if I pass. B. If I don't pass, I won't party. C. If I party, then I passed. D. If I don't party, I didn't pass.
Evaluate the integral.
A. 
B. 
C. 
D. 
Solve the problem.Some people must eat a low-sodium diet with no more than 2,000 mg of sodium per day. By eating 1 cracker, 1 pretzel, and 1 cookie, a person would ingest 149 mg of sodium. If a person ate 8 pretzels and 8 cookies, he or she would ingest 936 mg of sodium. By eating 6 crackers and 7 pretzels, the person would take in 535 mg of sodium. Which of the following is true?
A. A cracker has 30 mg of sodium. B. A cookie has 71 mg of sodium. C. A pretzel has 49 mg of sodium. D. None of these