If 
and 
, and the vectors make angles of 140° and 20° with the x-axis respectively, find the component form of the sum of u and v. Round answers to two decimal places.
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
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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. Find the amount of sodium in each.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
Solve the equation.
= 
A. -2, 6 B. 0, - 3 C. No solution D. 0, 36
Provide an appropriate response.Solve for x: ln x + ln 3 = ln(x + 1)
Fill in the blank(s) with the appropriate word(s).
Solve. Use interval notation to express the range.On the first four exams, your grades are 79, 82, 75, and 80. There is still a final exam, and it counts as two grades. You are hoping to earn a C in the course. This will occur if the average of your six exam grades is greater than or equal to 70 and less than 80. What range of grades on the final exam will result in earning a C?
A. [34, 84] B. [52, 82] C. [52, 82) D. [34, 84)