Determine whether the integration formula is correct. 
+ 
cot-1
x dx = ln x + ln (25 + 9x2) + 
x cot-1 
x + C
A. Yes
B. No
Answer: A
Mathematics
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Use the sinking fund formula to determine the payment needed to reach the accumulated amount. Round the answer to the nearest cent.Quarterly payments with 7.3% interest compounded quarterly for 5 years to accumulate $85,000
A. $1413.02 B. $3559.70 C. $393.99 D. $424.72
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Express the indicated roots of unity in standard form a + bi.Fourth roots of unity
A. 1 + 0i
cos 
+ i sin 
= 
+ 
i
cos 
+ i sin 
= 0 + i
cos 
+ i sin 
= - 
+ 
i
B. 1 + 0i
cos 
+ i sin 
= 0 + i
cos ? + i sin ? = -1 + 0i
cos 
+ i sin 
= 0 - i
C. 1 + 0i
cos 
+ i sin 
= 
+ 
i
1 - i
0 - i
D. 1 + 0i
cos 
+ i sin 
= 0 + i
cos ? + i sin ? = -1 + 0i
1 - i
Mathematics
Write the mixed number as an improper fraction. 17
A. 306
B. 35
C. 
D. 
Mathematics