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1. the points A (3,5) and B (6,2) are reflected over the y-axis. find the area of the figure formed by joining the points.

2. Liza wants tostart a small business of making souvenir items for sale. the fixed cost is 1200.00. the cost of making each souvenir is 30.00, and she sells each for 45.00. a.) how many souvenir items must be made in order to break even? b) what is the loss if only 400 items are made and sold? c) what is the profit if 1000 items are made and sold?

2 answers

1.
The area of a parallel trapezoid is half of the product of the height and the sum of the lengths of the parallel sides.

The height is difference between the projections of A and B on the y-axis. (Ie: 5-2)

The length of each side is the difference between the x-axis projections of the point and its reflection across the y-axis. (Ie: 3-(-3) and 6-(-6))
2.
Profit of n items made and sold is:
P(n) = (45.00-30.00)n - 1200.00

a. Find n when P(n)=0

b. Find: -P(400)
(Loss is negative profit)

c. Find: P(1000)
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