Divide. Simplify, if necessary.
÷ 
A. - 
B. 
C. - 
D. - 
Answer: A
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Find the indicated derivative for the given vector-valued function .Find Dtr(t) for r(t) = (t3)i - (csc t)j + 19k.
A. Dtr(t) = (3t2)i + (csc t cot t)j B. Dtr(t) = (3t2)i + (csc t cot t)k C. Dtr(t) = (3t2)i + (cot2 t)j D. Dtr(t) = (3t2)i - (csc t cot t)j
Solve the problem.Working together, Rick and Juanita can complete a job in 6 hours. It would take Rick 9 hours longer than Juanita to do the job alone. How long would it take Juanita alone?
A. 3 hr B. 6 hr C. 9 hr D. 15 hr
Solve using the substitution method. Use a graphing calculator to check your answer. 8x + 5y = 58x + 5y = 13
A. (1, 1) B. (8, 5) C. No solution D. Infinitely many solutions
Solve.In a chemistry class, 7 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.5 L B. 7.0 L C. 2.5 L D. 3.5 L