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OverLord2011 [107]
2 years ago
8

8. Derek was observing the change in water levels in his fish pond. The table below show the change in water levels of the fish

pond on different dates. DATE WATER LEVEL CHANGE (inches) August 25 -0.75 September 8 3 -1- 8 September 22 2.5 1 October 6 2 October 20 7. 1 8 CLEAR ALL Based on data in the table, what was the total change, in inches, of the water level in the fish pond from August 25 to October 20? whats the answer
​

Mathematics
1 answer:
Alla [95]2 years ago
8 0

Answer:

H. 2 3/4

Step-by-step explanation:

  • DATE                         >> WATER LEVEL CHANGE (inches)
  • August 25                  >>  -0.75
  • September 8              >>  -1 3/ 8
  • September 22            >>  2.5
  • October 6                    >>  -1/2
  • October 20                 >>  1 7/8

<u>Total change:</u>

  • 1 7/8 - (-0.75) =
  • 1+ 7/8 + 3/4 =
  • 1 + 7/8 + 6/8 =
  • 1 + 13/8 =
  • 1+ 1 5/8 =
  • 2 5/8

The closest answer option is H. 2 3/4

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The triangle that is formed from by connecting the shadow, the tree and the endpoints of each is a right triangle. The two triangles formed (by the tree and its shadow, and by Rachel and her shadow) are similar. In similar triangles, the corresponding sides are proportional. Thus, to give the numerical answer to this item,
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2 years ago
How long will it take before twenty percent of our 1,000-gram sample of uranium-235 has decayed? [See Section 6.6 Example 13] Th
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Answer:

From what I can see of the problem, you CANNOT solve for the half-life of U 235 AND then solve for the length of time to determine the 20% decay.

U-235 half-life is 704,000,000 years. (Wikipedia)

The elapsed time formula = half-life * [log (Beginning Amount / ending amount) / log 2]

elapsed time = 7.04 x 10^8 * [log (100 % / 80%) / log 2]

elapsed time =7.04 x 10^8 *  [log (1.25) / .30103]

elapsed time =7.04 x 10^8 *  [0.096910 / .30103]

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Step-by-step explanation:

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2 years ago
What is 10.3607 rounded to the nearest thousandth?
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Answer: 10.361

Step-by-step explanation:

After the decimal point, the decimal continues from tenths to hundredths, and to thousandths. So technically in 10.3607, the 0 would be inthe thousandths place. To round it, determine if the number next to 0 is greater than 5 or less than. If thenumber is 5 or greater than 5, the number will shift up by a digit. If it's less than, the digit remains the same. So, 0 would go up to a 1 since 7 is greater than 5.

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2 years ago
An 60 ounce bottle of grape juice contains 33 ounces of water a 50 ounce bottle of cranberry juice has 30 ounces of water which
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Answer:

Bottle containing cranberry juice has a greater percent of water.

Step-by-step explanation:

A 60 ounce bottle of grape juice contains 33 ounces of water.

So the percentage of water in the bottle = \frac{\text{Amount of water}}{\text{(Amount of water + juice)}}\times 100

= \frac{33}{60}\times 100

= 55%

Similarly 50 ounces bottle of cranberry juice contains 30 ounces of water.

So the percentage of water in the bottle =  \frac{\text{Amount of water}}{\text{(Amount of water + juice)}}\times 100

= \frac{30}{50}\times 100

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Therefore, bottle containing cranberry juice has a greater percent of water.

3 0
2 years ago
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A golfer recorded the following scores for each of four rounds of golf: 86, 81, 87, 82. The mean of the scores is 84. What is th
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Answer:

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Step-by-step explanation:

The mean of a set of number is the average the set of number, it is the ratio of the total sum of the terms to the sum of terms.

The standard deviation is the variation of a set of numbers to their mean. A low standard deviation means the value are close to the mean and a high standard deviation means the values are far from the mean. The standard deviation is given as:

\sigma=\sqrt{\frac{\Sigma (x_i-\mu)^2}{n} }\\ \\\mu=mean,n=number\ of\ terms, \sigma=standard\ deviation

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\Sigma(x_i-\mu)^2=(86-84)^2+(81-84)^2+(87-84)^2+(82-84)^2=4+9+9+4=26

Sum of squared deviations = 26

7 0
2 years ago
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