Calculate the angle between a and b (correct to the nearest degree).
a= 9i-8j, b=-7j+k
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b. 49°
Mathematics
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Solve the problem.What is the coefficient of a5b2c3 in the expansion of (a - 3b - 2c)10?
A. -72 B. 15,120 C. 2520 D. -181,440
Mathematics
Express the integrand as a sum of partial fractions and evaluate the integral.
A. 3 ln 
+ 
tan-1 
+ C
B. ln 
+ 
tan-1 
+ C
C. 3 ln 
+ tan-1 
+ C
D. 3 ln 
+ 
tan-1 
+ C
Mathematics
Find the range of the data set.
Use the following information to answer question, 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below. 3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
Mathematics
Find dp/dq for the following equation:
?
.
?
A. 
B. 
C. 
D. 
E. 
Mathematics