Determine whether the expression is a polynomial. If it is, state how many terms and variables the polynomial contains. Then state its degree.5m4n4 + 3mn9 - 7
A. Yes; 3; 2; 9
B. No
C. Yes; 3; 3; 18
D. Yes; 3; 2; 10
Answer: D
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FInd the tangential and normal components of the acceleration.r(t) = (t + 2)i + (ln(cos t) - 8)j + 7k
A. a = (sec t tan t)T + (sec t)N B. a = (sec t tan t)T - (sec t)N C. a = (-sec t tan t)T + (sec t)N D. a = (-sec t tan t)T - (sec t)N
Find the exact value of the expression.
A. - 
B. -2
C. - 
D. -
During testing of a certain brand of air purifier, the amount of smoke remaining t min after the start of the test was 
percent of the original amount. Compute 
. Round your answer to five
decimal places.
?
A. ?
per minute
per minute in the second power
B.
per minute
per minute in the second power
C.
per minute
per minute in the second power
D.
per minute
per minute in the second power
E.
per minute
per minute in the second power
Determine if the function is increasing or decreasing over the interval indicated.f(x) = (x2 - 9)2; (3, ?)
A. Increasing B. Decreasing