Determine whether the variation between the indicated quantities is direct or inverse.The cost of buying rice and the weight of the rice purchased.
A. Direct
B. Inverse
Answer: A
Mathematics
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Find the derivative.y = 9x2e-x
A. 9xe-x(x + 2) B. 18xe-x(1 - x) C. 9xex(2 - x) D. 9xe-x(2 - x)
Mathematics
Fill in the blank with one of the words or phrases listed below. 
The 
, written n!, is the product of the first n consecutive natural numbers.
A. arithmetic sequence B. factorial of n C. infinite sequence D. series
Mathematics
Use synthetic division to find the function value.f(x) = x3 + 3x2 + 4x - 3; find f(-5)
A. 180 B. -67 C. 177 D. -73
Mathematics
Find the zero of the function f.f(x) = 
x + 
A. 
B. - 
C. 
D. - 
Mathematics