Solve the rational equation.
= 
A. {-7}
B. {-1}
C. {7}
D. {3}
Answer: C
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Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R
= 6xC
= 0.01x2 + 1.1x + 40.
A. 355 units B. 490 units C. 245 units D. 710 units
Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = 
between x = 1 and x = 7 using a lower sum with two rectangles of equal width.
A. 1.179 B. 0.373 C. 4.125 D. 0.124
Determine whether or not the number is written in scientific notation.2.19 × 106
A. in scientific notation B. not in scientific notation
Provide an appropriate response.The demand function for an appliance company's line of washing machines is 
where p is the price (in dollars) per unit when q units are demanded (per week) by consumers. Find the level of production that will maximize the manufacturer's total revenue, and determine this revenue.
What will be an ideal response?