Evaluate the factorial expression.9!
A. 18
B. 362,880
C. 72
D. 13
Answer: B
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Use Euler's method to calculate the first three approximations to the given initial value problem for the specified increment size. Round your results to four decimal places.y' = y2(1 - 2x), y(-1) = -1, dx = 0.5
A. y1 = 0.4, y2 = 0.63, y3 = 0.7472 B. y1 = 0.7, y2 = 0.99, y3 = 1.2656 C. y1 = 0.5, y2 = 0.75, y3 = 1.03125 D. y1 = 0.7, y2 = 0.99, y3 = 1.9136
Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.4 B. 0.1 C. 2 D. 0.2
Solve the problem.A sample of 1000 g of lead-210 decays to polonium-210 according to the function given by 
where t is time in years. What is the amount of the sample after 70 years? Round the answer to the nearest gram.
A. 29 g B. 77 g C. 106 g D. 9393 g
Write the domain of f in interval notation.f(x) = 
A. ( -?, 7) B. [7, ?) C. (-7, ?) D. ( -?, 7]