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Goshia [24]
3 years ago
9

Please help

Mathematics
2 answers:
kvasek [131]3 years ago
5 0

Answer:

14,7

Step-by-step explanation:

Use Pythagorean theorem.

a^2+b^2=c^2

a=√21^2-15^2= √216=14,7

nevsk [136]3 years ago
4 0

Answer:

216

Step-by-step explanation:

^

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22. Use your model to determine when the volume of oil will get down to 500 gallons.
Helen [10]

Answer:

  21.  y = 75000·0.935^t

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Step-by-step explanation:

22. It is convenient to use the graphing calculator to solve this problem. The number of days is where the exponential curve has the value 500. It is about 74.55 days. (see the first attachment)

__

23. y = 27.8112·1.18832^t (see the second attachment)

__

24. The rate of change is the difference between the base of the exponential and 1, often expressed as a percentage. The time period is the units of t.

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25. Evaluating the function for t=24 gives y ≈ 1748.30425259 ≈ 1748.

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<em>Comment on graphing calculator</em>

A graphing calculator can make very short work of problems like these. It is worthwhile to get to know how to use one well.

8 0
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There are 50 animals in a shelter. Sixty percent of the animals are dogs. Which equation can be used to find the number of dogs
svetoff [14.1K]

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8 0
3 years ago
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<img src="https://tex.z-dn.net/?f=%28%5Cfrac%7B1%7D%7B4%7D%20%2B%5Cfrac%7B5%7D%7B4%7D%20%29%5E%7B2%7D%20%2B%5Cfrac%7B3%7D%7B4%7D
Assoli18 [71]

Answer:

Should be 3

Step-by-step explanation:

To add the fractions find the LCD then combine

4 0
3 years ago
Read 2 more answers
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