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Neko [114]
2 years ago
6

Find the area of this circle. Use

Mathematics
1 answer:
Stella [2.4K]2 years ago
6 0

Answer:

263.76yd^2

Step-by-step explanation:

area \: of \: a \: circle \: has \: the \: following \: formular \\ area = \pi \: d  \\ \pi = 3.14 \\ d = 84 \\ area = 3.14 \times 84 = 263.76yd {}^{2}

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Maria earned $126 in simple interest from her savings account. If she invested $450 for 7 years what was the interest rate?
RSB [31]
The answer is B. You didn't mention compounding, so I have to assume that this is simple interest. The formula for simple interest is 
<span>Interest = principal * interest rate expressed as a decimal * time in years. </span>
<span>$126 = $450 * X * 7. Now multiply $450 * 7 years = $3,150 </span>
<span>$126 = 3,150X </span>

<span>What has been done to the X? It was multiplied by $3,150. What is the opposite of multiplication? It is division. Remember that whatever we do to one side of the equal sign we must also do to the other side of the equal sign. </span>

<span>$126 = $3,150X </span>
<span>-------____---------- </span>
<span>$3,150__$3,150 </span>

<span>Any number over itself = 1. Now we have </span>
<span>.04 = X </span>

<span>To change a decimal to a percent move the decimal place two places to the right and add a percent sign. </span>
<span>.04 = 4$. The answer is B</span>
5 0
4 years ago
Scores on the GRE are normally distributed with a mean of 514 and a standard deviation of 92. Use the 68-95-99.7 rule to find th
SpyIntel [72]

Answer:

2.5%

Step-by-step explanation:

The percentage of people taking the test who are above 698 is ___%

Empirical rule formula states:

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

From the question, we have:

Mean of 514 and a Standard deviation of 92

Hence:

μ ± xσ

514 ± 92x = 698

514 + 92x = 698

92x = 698 - 514

92x = 184

x = 184/92

x = 2

Hence, the data is correct and it is 2 standard deviation from the mean. Therefore, 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

The question is asking us to find the percentage of people taking the test who are above 698 is calculated as:

100 - 95% /2

= 5/2

= 2.5%

The percentage of people taking the test who are above 698 is 2.5%

8 0
3 years ago
Jasmine bought 32 kiwi fruit for $16. IfJasmine has $4, how many kiwi can shebuy?
Sav [38]

Answer:

8 kiwis

Step-by-step explanation:

(÷4)32=$16(÷4)

8 =$4

hope this helps

7 0
3 years ago
Enter your answer as a simplified mixed number. B - 1/4 = 6 1/2
IrinaK [193]
The answer is B = 6 3/4. Please mark as brainliest if it did help and have a nice day!
6 0
4 years ago
Y / 770<br>work:<br>Solution y =​
Aloiza [94]

Answer:

Step-by-step explanation:

y + 77 = 180   {straight line}

y = 180 - 77

y = 103°

8 0
4 years ago
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