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Semmy [17]
2 years ago
8

Please help !!! Due instant

Mathematics
1 answer:
Vinvika [58]2 years ago
4 0
I believe the range is 25.
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What is the surface area of a pyramid that is 12 cm tall and has base edges of 8 cm and 6 cm?
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3 years ago
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A car repair bill was $210. The cost for parts was $75. The cost for labor was $45 per hour. How many hours did the repair work
Fantom [35]

Answer:

Step-by-step explanation:

45h + 75 = 210

45h = 135

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3 frames get made in 25 minutes. How many whole frames get made in 38 minutes
DIA [1.3K]

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6 0
3 years ago
A farmer has 900 feet of fence to build a pen that is up against an existing wall, so fencing is only needed on three sides. Wha
vivado [14]

Assuming a rectangular fenced area, let the area measure x feet by y feet. Then the length of fencing used is such that

2x + y = 900 \implies y = 900 - 2x

where y is the length of the side parallel to the existing wall.

The area enclosed by the fence is

A(x,y) = xy \implies A(x) = x(900-2x) = 900x - 2x^2

Find the critical points of A(x).

A'(x) = 900 - 4x = 0 \implies x = 225

If two sides measure 225 feet, then the remaining side must measure

y = 900 - 2\cdot225 = 450

feet. So the pen must have dimensions 225-ft by 450-ft. We know this gives a maximum area, since by completing the square we find an upper bound for the enclosed area of

900x - 2x^2 = -2 (x^2 - 450x) \\\\ ~~~~~~~~ = -2 (x^2 - 450x + 225^2 - 225^2) \\\\ ~~~~~~~~ = 2\cdot225^2 - 2 (x - 225)^2 \\\\ ~~~~~~~~ \le 2\cdot225^2 = 101,250

square feet.

7 0
2 years ago
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