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umka2103 [35]
3 years ago
10

A ​used-car dealership buys a car for ​$2700 and then sells it for ​$3900. What is the percent​ increase?

Mathematics
1 answer:
uranmaximum [27]3 years ago
7 0

Answer:

400/9 = 44. 444... or 44.5

Step-by-step explanation:

difference in price/original price * 100

1200/2700 * 100

4/9 * 100

= 400/9

<em>percentage is 44.5 %</em>

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3 years ago
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The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of 98.35°F and a standard deviati
DochEvi [55]

Answer:

a) 99.97%

b) 65%

Step-by-step explanation:

• 68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

• 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ.

• 99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ.

Mean of 98.35°F and a standard deviation of 0.64°F.

a. What is the approximate percentage of healthy adults with body temperatures within 3 standard deviations of the mean, or between 96.43°F and 100.27°F?

μ - 3σ

98.35 - 3(0.64)

= 96.43°F

μ + 3σ.

98.35 + 3(0.64)

= 100.27°F

The approximate percentage of healthy adults with body temperatures is 99.97%

b. What is the approximate percentage of healthy adults with body temperatures between 97 .71°F and 98.99°F?

within 1 standard deviation from the mean - that means between μ - σ and μ + σ.

μ - σ

98.35 - (0.64)

= 97.71°F

μ + σ.

98.35 + (0.64)

= 98.99°F

Therefore, the approximate percentage of healthy adults with body temperatures between 97.71°F and 98.99°F is 65%

4 0
3 years ago
Is 6 less than 6.00?
Nadya [2.5K]
No, they are the same value.
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2 years ago
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271.

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8 0
3 years ago
VERY EASY, WILL GIVE 50 POINTS FOR CORRECT ANSWER ASAP AND WILL GIVE BRAINLIEST.
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C. Reflected over the y-axis and translated up 1 unit

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3 years ago
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