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gladu [14]
2 years ago
10

A prairie dog left its burrow 5 feet underground and started digging deeper into the ground. It digs straight down at a constant

rate of 2
feet per minute.
How long does it take the prairie dog to reach 13 feet underground?
Enter your answer in the box
min

Willing to give Brainliest No Links

Mathematics
1 answer:
SpyIntel [72]2 years ago
7 0

Building and solving an equation to model the situation, it is found that it takes 4 min for the prairie dog to reach 13 feet underground.

  • Initially, the dog is 5 feet underground.
  • Each minute, the dog goes 2 more feet underground.

Hence, the underground height of the dog after t seconds is given by:

h(t) = 5 + 2t

The time it takes for the dog to reach 13 feet underground is <u>t for which h(t) = 13</u>, hence:

h(t) = 5 + 2t

13 = 5 + 2t

2t = 8

t = \frac{8}{2}

t = 4

It takes 4 min for the prairie dog to reach 13 feet underground.

A similar problem is given at brainly.com/question/25290003

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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

  305 °F

Step-by-step explanation:

The core temperature of the object after 4 hours can be found using an exponential decay formula to model the decay of the difference between core temperature and ambient.

<h3>Cooling Model</h3>

The solution to the differential equation described by Newton's law of cooling is the exponential equation ...

  y = ab^t +c

where 'a' is the initial core temperature difference from ambient, 'b' is the decay factor of that difference in 1 unit of time period t. 'c' is the ambient temperature.

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Using these values in the model gives ...

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Note that units of time are hours.

<h3>Application</h3>

We want y when t=4.

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The core temperature after 4 hours is about 305 °F.

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<em>Additional comment</em>

The differential equation will have a solution of the form ...

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In the above, we defined b = e^k = 75/112. Accuracy with this fraction can be better than using a truncated value of k.

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