By asking students to answer un-biased, and with detail. Comparing and contrasting each others' genre preference is also useful.
<span>32.49 = 30
</span><span>4.26 = 5
30 / 5 = 6
answer
6
</span>
Writing the two equations in full and subtracting R(x) from W(x) to arrive at D (x) gives the answer. This is shown below;
W(x) = 0.002x^3 - 0.01x^2 + 0x + 0
R (x) = 0x^3 + x^2 - 4x +13 -
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D(x) = 0.002x^3 -1.01x^2 + 4x - 13
Normally when you're gathering sources it depends on what the topic is, what time or day, you try to find facts, and you see if there are any other useful information.