Solve the equation.880 = 4 ? n
A. n = 876
B. n = 3520
C. n = 4
D. n = 220
Answer: D
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Find the principal unit normal vector N for the curve r(t).r(t) = (9t sin t + 9 cos t)i + (9t cos t - 9 sin t))k
A. N = - 
(cos t)i - 
(sin t)k
B. N = (cos t)i - (sin t)k
C. N = (-sin t)i - (cos t)k
D. N = (sin t)i + (cos t)k
Evaluate.If f(x) = 
, find the value of f(1).
A. 
B. 
C. -18
D. 18
Evaluate the expression by hand, if possible.4 log 0.01
A. 6 B. -8 C. - 2 D. 2
If a problem asks you to “Find a formula . . . “ you might begin by
(a) drawing a sketch of the problem situation. (b) understanding the terms used in the problem. (c) looking for relationships between known quantities and the unknown quantity. (d) making a tables of values, using n as the unknown quantity. (e) trying any one of the above.