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9. &#8747; (1/x)[ln (x)]^4 dx =

(1/5)ln |ln x| + C
(1/5)(ln x)^5 + C
5(ln x)^5 + C
- 1/(ln x)^5 + C
none of these

10. Acme estimates marginal revenue on a product to be 200q-1/3 dollars per unit when the level of production is q units. The corresponding marginal cost is 2q dollars per unit. Suppose the profit is \$250 when the level of production is 1 unit. What is Acme's profit when 8 units are produced?
(Note: P'(t) = R'(t) - C'(t) and P(0) = 0)
\$937
\$987
\$1037
\$1087
\$1137
\$1187
\$1237
none of these

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#### Solution Preview

9. &#8747; (1/x)[ln (x)]^4 dx =

(1/5)ln |ln x| + C
(1/5)(ln x)^5 + C
5(ln x)^5 + C
- 1/(ln x)^5 + C
none of these

The correct answer is
(1/5)(ln x)^5 + C

It is ...

#### Solution Summary

This shows an example of integration and an example of working with the profit function.

\$2.49