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Vesnalui [34]
3 years ago
8

Ying is a professional deep water free diver.

Mathematics
1 answer:
mash [69]3 years ago
7 0

Answer:

The lowest point is -100 meters, or 100 meters down

Step-by-step explanation:

D(x)=1/36(x-60)^2-100

This equation is in vertex form

y = a(x-h)^2 +k  where (h,k) is the vertex

Since a is positive, the parabola opens up

The vertex is the minimum, which means it will be the lowest point

The vertex is (60,-100)

The lowest point is -100 meters, or 100 meters down

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How did the temperature change if: At first it increased by 25% and then decreased by 40%
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Answer:

24.6 % decrease

Step-by-step explanation:

Let x be the original temperature

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x + .25x

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The amount decreased is

(1.25x) *.40

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Subtract that from 1.25x

1.25x - .496x

.754x

We need to find the percent decrease

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