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ryzh [129]
4 years ago
15

What 15 by 15 I need to know!!

Mathematics
2 answers:
Colt1911 [192]4 years ago
7 0
15 times 15 = 225. :) since i helped you, can you help me? My question: <span>brainly.com/question/2967131</span>
kow [346]4 years ago
4 0
It is 225 because 15*15 is 225
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I need help asap<br> I cannot figure this out
tankabanditka [31]
The answer is A :)))
3 0
2 years ago
Please help! see attached
nikdorinn [45]

Answer:

  1. The lowest value of the confidence interval is 0.5262 or 52.62%
  2. The highest value of the confidence interval is 0.5538 or 55.38%

Step-by-step explanation:

Here you estimate the proportion of people in the population that said did not have children under 18 living at home.It can also be given as a percentage.

The general expression to apply here is;

C.I=p+-z*\sqrt{\frac{p(1-p)}{n} }

where ;

p=sample proportion

n=sample size

z*=value of z* from the standard normal distribution for 95% confidence level

Given;

n=5000

<u>Find p</u>

From the question 54% of people chosen said they did not have children under 18 living at home

\frac{54}{100} *5000 = 2700\\\\p=\frac{2700}{5000} =0.54

<u>To calculate the 95% confidence interval, follow the steps below;</u>

  • Find the value of z* from the z*-value table

The value of z* from the table is 1.96

  • calculate the sample proportion p

The value of p=0.54 as calculated above

  • Find p(1-p)

0.54(1-0.54)=0.2484

  • Find p(1-p)/n

Divide the value of p(1-p) with the sample size, n

\frac{0.2448}{5000} =0.00004968

  • Find the square-root of p(1-p)/n

=\sqrt{0.00004968} =0.007048

  • Find the margin of error

Here multiply the square-root of p(1-p)/n by the z*

=0.007048*1.96=0.0138

The 95% confidence interval for the lower end value is p-margin of error

=0.54-0.0138=0.5262

The 95% confidence interval for the upper end value is p+margin of error

0.54+0.0138=0.5538

7 0
3 years ago
Read 2 more answers
Pi is a mathematical term that has a numerical value of 3.14 how would this number be written in expanded form.
igomit [66]
3 + 0.1 + 0.04

equals

3.14
7 0
3 years ago
65.25=7.25h-10.25 if you solve what would you get?
Ksivusya [100]

Answer:

h=10.4137931                        ..

Explanation:  10.25 +65.25=75.5 . 75.5 divided by 7.25=10.4137931

3 0
3 years ago
1/6 of a farm is planted maize,1/4 is planted beans and the remaining part is planted potatoes.What fraction of field is planted
solmaris [256]

Answer:

7/12

Step-by-step explanation:

fraction of field is planted potatoes = 1 - sum of fraction of farm planted with maize and beans

sum of fraction of farm planted with maize and beans  =

\frac{1}{6} + \frac{1}{4}

\frac{2 + 3}{12} = 5/12

1 - 5/12 = 7/12

6 0
3 years ago
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