Express the sum using summation notation. Use a lower limit of summation not necessarily 1 and k for the index of summation.9 + 10 + 11 + 12 + . . . + 33
A. 
B. 
C. 
D. 
Answer: A
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Evaluate.A2 + B2, where A = 2.2 and B = 7.6
A. 96.04 B. 19.6 C. 62.6 D. 39.2
Add: (1 - j8) + (6 + j3)
a. 7 + j11 b. 5 - j11 c. 5 - j5 d. 7 - j5 e. 6 - j11
Use the method of natural frequencies to find the indicated probability.In the town of Maplewood a certain type of DVD player is sold at just two stores. 44% of the sales are from store A and 56% of the sales are from store B. 2.3% of the DVD players sold at store A are defective while 4.2% of the DVD players sold at store B are defective. If Kate receives one of these DVD players as a gift and finds that it is defective, what is the probability that it came from store A?
A. 0.301 B. 0.699 C. 0.023 D. 0.430
Solve the problem.f(x) = tan x is defined over the interval 
.(a) Approximate the area A by partitioning 
into 4 subintervals of equal length and choosing u as the left endpoint of each subinterval.(b) Approximate the area A by partitioning 
into 8 subintervals of equal length and choosing u as the right endpoint of each subinterval.(c) Express the area A as an integral.(d) Use a graphing utility to approximate this integral to three decimal places.
What will be an ideal response?