Solve the problem.The total resistance R due to two resistances connected in parallel is given by: R =
.Use partial-fraction decomposition to write
in terms of partial fractions.
A. =
+
B. =
+
C. =
+
D. =
+
Answer: A
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Solve the problem.During a poll, 15,980 people were asked whether they favored a particular ballot measure. 50% of them said they favored the measure. How many people favored the ballot measure?
A. 7980 people B. 799 people C. 79,900 people D. 7990 people
Solve the problem.An airplane is sighted at the same time by two ground observers who are 5 miles apart and both directly west of the airplane. They report the angles of elevation as 13° and How high is the airplane?
A. 1.87 mi B. 1.12 mi C. 2.69 mi D. 4.49 mi
Solve and graph.x ? 4 or x ? 7
A. [-7, -4]
B. (-?, 4] ? [7, ?)
C. (4, 7)
D. (-4, 7)
Choose the function that might be used as a model for the data in the scatter plot.
A. Polynomial, not quadratic B. Logarithmic, f(x) = a + b ln x C. Exponential, f(x) = ab-x or f(x) = P0e-kx, k > 0 D. Exponential, f(x) = abx or f(x) = P0ekx, k > 0