Factor completely.9x4 - 24x3 + 16x2
A. x2(3x - 4)(3x - 4)
B. (9x2 + 4)(x2 + 4)
C. x2(9x - 1)(x - 16)
D. x(3x + 4)(3x + 4)
Answer: A
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cot(7x - 5)
A. y = cot u; u = 7x - 5; 
= - 7 csc2(7x - 5)
B. y = cot u; u = 7x - 5; 
= - 7 cot(7x - 5) csc(7x - 5)
C. y = 7u - 5; u = cot x; 
= - 7 cot x csc2 x
D. y = cot u; u = 7x - 5; 
= - csc2(7x - 5)
Find the product.(-9)(-9)
A. 91 B. -81 C. -91 D. 81
Decide whether the dose is reasonable or unreasonable. If it is unreasonable, indicate whether it is too much or too little.Take 19 milliliters of cough syrup every four hours.
A. Unreasonable, too much B. Reasonable C. Unreasonable, too little
Find the interest earned. Assume 3
% interest compounded daily, as in the following table, and use the exact number of days. Round to the nearest cent. 
Amount: $3850Deposited: Sept 24Withdrawn: Nov 7
A. $23.33 B. $16.28 C. $3866.28 D. $25.00