Solve the problem.The polynomial -0.1t2 + 8t describes the average number of digits that participants in a memorization experiment were able to recall after t minutes. Find the number of digits recalled after 6 minutes. Round to the nearest digit.
A. 44 digits
B. 64 digits
C. 24 digits
D. 84 digits
Answer: A
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Find first four terms of the indicated expansion by use of the binomial series.(1 + x)-2
A. 1 - 2x + 3x2 - 4x3 + . . . B. 1 - 2x - 3x2 - 4x3 - . . . C. 1 + 2x + 3x2 + 4x3 + . . . D. 1 - 2x + 3x2 - 8x3 + . . .
Find the LCM for the given numbers by an appropriate method.25,886 and 48,734
A. 6,436,369 B. 90,109,166 C. 2537 D. 14
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 10(cos 30° + i sin 30°), z2 = 5(cos 10° + i sin 10°)
A. 5(cos 3° + i sin 3°) B. 2(cos 3° + i sin 3°) C. 2(cos 20° + i sin 20°) D. 5(cos 20° + i sin 20°)
Solve the problem.It has been found that the less income people have, the more likely they are to report that their health is fair or poor. The function 
models the percentage of Americans reporting fair or poor health, f(x), in terms of annual income, x, in thousands of dollars. According to the model, what annual income corresponds to 18% reporting fair or poor health? Round to the nearest thousand dollars.
A. approximately $21 thousand B. approximately $19 thousand C. approximately $23 thousand D. approximately $20 thousand