Find the average velocity of an object which follows the position function s(t) over the given interval.s(t) = 
, [4, 7]
A. 
B. 2
C. 7
D. - 
Answer: D
Mathematics
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Evaluate the integral by making a substitution and then using a table of integrals. 
A. 9 sin-1
+ x
+ C
B. 
- 3 ln
+ C
C. 9 sin-1
- 
+ C
D. 9 sin-1
- 
+ C
Mathematics
Find 
. Write your answer in standard polar form with the argument in radians.z1 = 
, z2 = 
A. 
B. 
C. 
D. 
Mathematics
Solve. Give your answer as a mixed numeral.Peter must practice the piano 13
hours per week. He has already practiced 2
hours. How many more hours does he need to practice?
A. 10
hr
B. 11
hr
C. 10 hr
D. 9
hr
Mathematics
Express the percent as a fraction or mixed number in simplest form.11
%
A. 1175
B. 5
C. 117
D. 
Mathematics