Use a finite sum to estimate the average value of the function on the given interval by partitioning the interval and evaluating the function at the midpoints of the subintervals.f(x) = 
on 
divided into 5 subintervals
A. 
B. 
C. 
D. 
Answer: B
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Find the domain of the rational function.f(x) = 
A. all real numbers except ±9
B. all real numbers except ±9, 
C. all real numbers except 9
D. all real numbers except 81
Simplify the expression.
?
What will be an ideal response?
Multiply.0.257 × 2.9
A. 0.7453 B. 3 C. 3.157 D. 0
Express the indicated roots of unity in standard form a + bi.Seventh roots of unity
A. 1 + 0i
cos 
+ i sin 
? 0.62 + 0.78 i
cos 
+ i sin 
? - 0.22 + 0.97 i
cos 
+ i sin 
? - 0.90 + 0.43 i
cos 
+ i sin 
? - 0.90 - 0.43 i
cos 
+ i sin 
? - 0.22 - 0.97 i
cos 
+ i sin 
? 0.62 - 0.78 i
0 - i
B. 1 + 0i
cos 
+ i sin 
? 0.90 + 0.43 i
cos 
+ i sin 
? 0.62 + 0.78 i
cos 
+ i sin 
? 0.22 + 0.97 i
cos 
+ i sin 
? - 0.22 + 0.97 i
cos 
+ i sin 
? - 0.62 + 0.78 i
cos 
+ i sin 
? - 0.90 + 0.43 i
C. 1 + 0i
cos 
+ i sin 
? 0.62 + 0.78 i
cos 
+ i sin 
? - 0.22 + 0.97 i
cos 
+ i sin 
? - 0.90 + 0.43 i
cos 
+ i sin 
? - 0.90 - 0.43 i
cos 
+ i sin 
? - 0.22 - 0.97 i
cos 
+ i sin 
? 0.62 - 0.78 i
D. 1 + 0i
cos 
+ i sin 
? 0.62 + 0.78 i
cos 
+ i sin 
? - 0.22 + 0.97 i
cos 
+ i sin 
? - 0.90 + 0.43 i
cos 
+ i sin 
? - 0.90 - 0.43 i
cos 
+ i sin 
? - 0.22 - 0.97 i
1 - i