Perform the indicated operations.Estimate by rounding to the nearest ten, then find the actual sum. 48172687
A. Estimate: 210
Actual: 193
B. Estimate: 200
Actual: 265
C. Estimate: 193
Actual: 145
D. Estimate: 190
Actual: 178
Answer: A
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Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = x2 between x = 4 and x = 8 using a left sum with four rectangles of equal width.
A. 174 B. 149 C. 126 D. 165
Solve the problem.How long will it take for $7000 to grow to $20,400 at an interest rate of 5.9% if the interest is compounded continuously? Round the number of years to the nearest hundredth.
A. 18.13 yr B. 1812.92 yr C. 1.81 yr D. 0.18 yr
Factor completely.x2 - 18xy + 81y2
A. (x - 9y)(x + 9y) B. (x + 9y)2 C. (x - 9y)2 D. Prime
Evaluate the expression using the given values.
+ 
; x = 4, y = -1, z = 5.
A. 9 B. -8 C. -9 D. 8