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ArbitrLikvidat [17]
3 years ago
8

This table shows the area in inches of four rectangular scraps of fabric.

Mathematics
2 answers:
mote1985 [20]3 years ago
8 0

Answer:

<h2>82 in²</h2>

Step-by-step explanation:

The median of the four numbers a, b, c and d. Where a ≤ b ≤ c ≤ d:

\dfrac{b+c}{2}

We have

84in², 72in², 80in², 84in² → 72in², 80in², 84in², 84in²

The median:

\dfrac{80+84}{2}=\dfrac{164}{2}=82\ in^2

kirill [66]3 years ago
7 0
The answer is C

If you look at the numbers, the two medians are 80 and 84.
If you find the median between them you will find 82

Hope this helped!!
⊕
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The time to complete an exam is approximately Normal with a mean of 70 minutes and a standard deviation of 10 minutes. Using the
MatroZZZ [7]

Answer:

16% of students will complete the exam in less than 60 minutes

Step-by-step explanation:

The Empirical Rule(68-95-99.7) states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 70

Standard deviation = 10

What percentage of students will complete the exam in less than 60 minutes

60 = 70-10

So 60 is one standard deviation below the mean

By the Empirical Rule, 68% of the measures are within 1 standard deviation of the mean, that is, from 60 to 80 minutes. The other 100-68 = 32% is outside this interval. Since the normal distribution is symmetric, 16% of those are below 60 and 16% of those are above 80.

16% of students will complete the exam in less than 60 minutes

5 0
3 years ago
What is 8.61×10−8 in decimal form?
Ierofanga [76]

Answer:

0.000000861

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
How much fabric is needed to<br><br><br>create the sail below?<br>14ft by 9 ft
olga55 [171]

Answer:

126 ft

Step-by-step explanation:

Calculate the area (length x height)

14 x 9 = 126

4 0
3 years ago
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Jacob baked 42 sugar cookies and 30 oatmeal cookies to package for his friends at school. He wants to package the cookies into i
wolverine [178]

Answer:

6

Step-by-step explanation:

Given the following :

Number of sugar cookies = 42

Number of Oatmeal = 30

To package the cookies into identical containers so that each container has the same number of cookies with no left over ;

We find the greatest common factor of 42 and 30

Factors of 42 : 1, 2, 3, 6, 7, 14, 21, 42

Factors of 30 : 1, 2, 3, 5, 6, 10, 15, 30

The greatest common factor = 6

8 0
3 years ago
Please Help, What is the value of x?
Olenka [21]
The triangles are simiar by AAA, so
\dfrac{x}{4\,cm}=\dfrac{40\,cm}{32\,cm}\\\\x=(4\,cm)\cdot\dfrac{40}{32}\\\\x=5\,cm
6 0
3 years ago
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