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salantis [7]
3 years ago
8

If 1 cost 9p find the cost of 100

Mathematics
1 answer:
damaskus [11]3 years ago
7 0
9p times 100 = 900p or £9
You might be interested in
An investigator thinks that people under the age of forty have vocabularies that are different than those of people over sixty y
Kay [80]

Answer:

t=\frac{(14-20)-0}{\sqrt{\frac{5^2}{31}+\frac{6^2}{31}}}}=-4.28  

Now we can calculate the p value with the following probability:

p_v =2*P(t_{60}  

The p value is a very low value so then we have enough evidence to reject the null hypothesis and we can conclude that people under the age of forty have vocabularies that are different than those of people over sixty years of age.

Step-by-step explanation:

Information given

\bar X_{1}=14 represent the mean for sample 1 (younger)

\bar X_{2}=20 represent the mean for sample 2 (older)  

s_{1}=5 represent the sample standard deviation for 1  

s_{f}=6 represent the sample standard deviation for 2  

n_{1}=31 sample size for the group 2  

n_{2}=31 sample size for the group 2  

t would represent the statistic

System of hypothesis

We want to test if  that people under the age of forty have vocabularies that are different than those of people over sixty years of age, the system of hypothesis are:

Null hypothesis:\mu_{1}-\mu_{2}=0  

Alternative hypothesis:\mu_{1} - \mu_{2}\neq 0  

The statistic is given by:

t=\frac{(\bar X_{1}-\bar X_{2})-\Delta}{\sqrt{\frac{\sigma^2_{1}}{n_{1}}+\frac{\sigma^2_{2}}{n_{2}}}} (1)  

And the degrees of freedom are given by df=n_1 +n_2 -2=31+31-2=60  

Replacing the info given we got:

t=\frac{(14-20)-0}{\sqrt{\frac{5^2}{31}+\frac{6^2}{31}}}}=-4.28  

Now we can calculate the p value with the following probability:

p_v =2*P(t_{60}  

The p value is a very low value so then we have enough evidence to reject the null hypothesis and we can conclude that people under the age of forty have vocabularies that are different than those of people over sixty years of age.

6 0
3 years ago
Which 3-D object is a polyhedron?<br> A. sphere<br> B. cube <br> C. cone
Levart [38]

Answer:

The answer is A.

Step-by-step explanation:

A polyhedron is a three-dimensional solid made up of polygons. It has flat faces, straight edges, and vertices. For example, a cube, prism, or pyramid are polyhedrons.

7 0
2 years ago
Collin ordered a set of yellow and brown pins. He received 400 pins in all. 340 of the pins were yellow. What percentage of the
cupoosta [38]
The yellow pins show as 85% of the total number of pins that Collin ordered
6 0
3 years ago
Please need help with this question anyone ?
Zina [86]

Answer:

106 = 1,000,000 x 3.63

Step-by-step explanation:

a = 3.63 (Please notice any zeroes on the end have been removed)

b = 6

3.63 x 106

Check your work:

106 = 1,000,000 x 3.63 = 3,630,000

4 0
2 years ago
What’s does 3/5 + 1/3 equal
Pie

Answer:

Step-by-step explanation:

3/5 + 1/3

taking lcm we get 15

=<u> 3 * 3 + 1 * 5</u>

          15

= <u>9 + 5</u>

     15

=14/ 15

4 0
3 years ago
Read 2 more answers
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