3 years ago

Find the missing length to the nearest teni

Mathematics

1 answer:

Temka [501]3 years ago

3 0

Answer: Its A 9

Step-by-step explanation: LOLLLLL is that rock lee form Naruto :D

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In a psychology class, 28 students have a mean score of 83.6 on a test. Then 25 more students take the test and their mean score

GalinKa [24]

Answer:

The new mean would be given by:

$\bar X_f = \frac{\sum_{i=1}^n X +X_1}{28+25}$

And replacing we got:

$\bar X_f = \frac{2340.8+ 1720}{28+25}= 76.6$

Step-by-step explanation:

We know that the original mean from the 28 students is given by:

$\bar X= \frac{\sum_{i=1}^{28} X_i}{28}= 83.6$

The sum of the values is:

$\sum_{i=1}^{28} X_i = 28*83.6 =2340.8$

And now we know that the new mean is 68.8 with the 25 new people so then the new mean would be given by:

$\bar X_1 = \frac{\sum_{i=1}^{25} X_i}{25} = 68.8$

The sum of the values is:

$\sum_{i=1}^{25} X_i = 25*68.8 =1720$

The new mean would be given by:

$\bar X_f = \frac{\sum_{i=1}^n X +X_1}{28+25}$

And replacing we got:

$\bar X_f = \frac{2340.8+ 1720}{28+25}= 76.6$

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3 years ago

A certain pet store has only cats and dogs. The ratio of the number of cats to the

Anna11 [10]

There are 316 animals there

6 0

4 years ago

Read 2 more answers

Alexis bought 1_2 pound of grapes. How many ounces of grapes did she buy?

Olin [163]

Answer:

8 oz.

Step-by-step explanation:

One pound is 16oz and ½ of that is 8oz

6 0

3 years ago

The volume of a sphere is a function of its radius. V equals 4 over 3 πr cubed . Evaluate the function for the volume of a volle

Nataly_w [17]

Answer:

The answer to your questin is: V = 5276.7 cm³

Step-by-step explanation:

Data

radius = 10.8 cm

Volume = ?

Formula

$V = \frac{4}{3} \pi r^{3}$

$V = \frac{4}{3} \pi (10.8)^{3}$

V = 5276.7 cm³

4 0

3 years ago

How would I solve <br> -(28-45)=17

Nonamiya [84]

<span>-(28-45)
= -28 -(-45)
=-28 + 45
= 45 - 28
= 17

hope it helps</span>

5 0

4 years ago