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3 years ago

Use the formula to evaluate the infinite series riund to the nearest hundredth if necessary 9+3+1+

1 answer:

6 0

Sum to infinity = a1 / ( 1 - r) (This is a geometric series a1 = first term, r = common ratio)

Here r = 3/9 = 1/3 and a1 = 9

So the answer is 9 / (1 - 1/3) = 9 / 2/3 = 9 * 3/2 = 13.5 Answer

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On a finance exam, 15 accounting majors had an average grade of 90. On the same exam, 7 marketing majors averaged 85, and 10 fin

lilavasa [31]

Answer:

89.84375

Step-by-step explanation:

Given that on a finance exam, 15 accounting majors had an average grade of 90. On the same exam, 7 marketing majors averaged 85, and 10 finance majors averaged 93.

To find weighted mean.

Here weights can be considered as number of majors in each subject

$Marks x 90 85 93\\Weights 15 7 10\\Product 1350 595 930\\$

Weighted total = 1350+595+930 = 2875

Weighted mean = weighted total/total students

$=\frac{2875}{32} =89.84375$

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3 years ago

Tien reads for 45 minutes each night before going to bed. Which expression will

Svetllana [295]

Answer:

135 !!!!!!!!!!!!

Step-by-step explanation:

Your welcome!!!

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3 years ago

Andrew's bowling scores are approximately normally distributed with mean 130 and standard deviation 21, while Pam's scores are n

White raven [17]

Answer:

Step-by-step explanation:

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3 years ago

Can someone show me how to do Mean absolute deviation

morpeh [17]

To find the mean of a set, add up all of the numbers and divide by how many numbers you have. For the first set:
$\mu=\frac{10.7+2.4}2=\frac{13.1}2=6.55$
For the second set:
$\mu=\frac{13.7+2.5}2=\frac{16.2}2=8.1$

To find the mean absolute deviation, (MAD) find the mean of the distances of each number from the mean.
For the first set:
$MAD=\frac{|10.7-6.55|+|2.4-6.55|}2=\frac{4.15+4.15}2=\frac{8.3}2=4.15$
For the second set:
$MAD=\frac{|13.7-8.1|+|2.5-8.1|}2=\frac{5.6+5.6}2=\frac{11.2}2=5.6$
Note that when you only have two data points the mean is directly between them, which is why the distances are the same.

The means-to-MAD ratio is simply that, divide one by the other and that's it.
For the first set:
$6.55\div4.15=1.57831325$
For the second set:
$8.1\div5.6=1.44642857$

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3 years ago

Find the Area of the shaded region of the trapezoid below. (show your work or explain how you got your answer in words) *

Rudiy27

This is the full answer to the question

5 0

3 years ago