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2 years ago

Need help with question 15 I did the work for it but the answer was wrong somehow it didn't work out question is on the photo

Mathematics

1 answer:

Reptile [31]2 years ago

3 0

Answer:

336, (B)

Step-by-step explanation:

To find the surface area, find the area of each square and triangle

10x12 + 2(6x8)/2 + 12x6 + 8x12

This would then be,

120 + 48 + 72 + 96

Surface area = 336, (B)

You made a mistake on step 2.

When finding the area of triangle, you have to divide by 2.

Hope this helps!

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How can you find the Mean Absolute Deviation (MAD) for this set of data?

den301095 [7]

Answer: Add all the absolute deviations and divide by number of swimmers.

Step-by-step explanation:

To find the mean absolute deviation of any data we need to follow the following steps:

Start by finding the mean of the data set.
Find the absolute value of the difference between each data value and the mean.
Find the sum of the absolute values of the differences.
Divide the sum of the absolute values of the differences by the number of data values.

We can see in the picture that it already dome with first two steps so the step after that is " Add all the absolute deviations and divide by number of swimmers."

5 0

3 years ago

Read 2 more answers

Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -6 and 162, respectively.

Vesna [10]

Answer:

b. an = 2 • (-3)^(n - 1)

Step-by-step explanation:

Before we test a solution or two, we can easily discard most of them.

We see the values alternate of signs (-5 for the 2nd term and +162 for the 5th term)... so the progression factor has to be negative (in order to alternate sign). <u>That already excludes answers A and C.</u>

Normally, a geometric progression has the (n-1) exponent, not (n+1), so our chances seem to be better with B.

We can test both D and B with n = 2, to obtain -6

Let's test answer D before:

$a_{2} = 2 * (-3)^{2+1} = 2 * (-3)^{3} = 2 * -27 = -54$

The result is -54, not -6... so it's not the right result.

Let's test answer B then:

$a_{2} = 2 * (-3)^{2-1} = 2 * (-3)^{1} = 2 * -3 = -6$

Right! Let's verify with n=5 to get 162:

$a_{5} = 2 * (-3)^{5-1} = 2 * (-3)^{4} = 2 * 81 = 162$

Confirmed, answer is B. an = 2 • (-3)^(n - 1)

3 0

3 years ago

Only answer if you are sure!!

bezimeni [28]

Answer

standard deviation

Explanation

Standard deviation is the measure of spread of data around the mean.

Mode is the most common value - which would be the mean in a normal-like distribution.

Median is the middle value when the data is ranked in ascending order (or descending even)

Skewness, is when the mode of the data falls behind the mean by a large margin.

An example is GDP, a few billionaires increase the number number and distort it, even though most people are of low or middle based income.

8 0

3 years ago

I need to know this?

Fittoniya [83]

what are your answer choices for your questions so i can be aware about how to correctly solve this

8 0

3 years ago

Geometry Question, I’m really super duper confused here

abruzzese [7]

Check the picture below.

make sure your calculator is in Degree mode.

7 0

3 years ago