Solve the proportion. 
(a) 11
(b) 1
(c) -11
(d) 2
(c) -11
Mathematics
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Differentiate the function.r(t) = (cot t)i + (csc t)j
A. r'(t) = (sec2 t)i + (tan t sec t)j B. r'(t) = (csc2 t)i + (cot t csc t)j C. r'(t) = (-csc2 t)i - (cot t csc t)j D. r'(t) = (-sec2 t)i - (tan t sec t)j
Mathematics
Solve the problem.Find the area of the region between the curve y = 4x/(1 + x2) and the interval 
of the x-axis.
A. 4 e5 B. 0 C. ln 5 D. 4 ln 5
Mathematics
Determine the most appropriate metric unit to go in the blank. Choose from L, ml, kg, g, and mg.The tablet contained 530 
of vitamin C.
A. mL B. L C. g D. mg E. kg
Mathematics
Factor completely.32a4b - 98b3
A. 2b(4a2 + 7b)(4a2 - 7b) B. 2b(4a + 7b)2 C. 2b(4a - 7b)2 D. Prime
Mathematics