Answer:
Rewrite
27
as
3^2⋅3
Pull terms out from under the radical.
3(3√3)
Multiply 3 by 3
9√3
The result can be shown in multiple forms.
Exact Form:
9√3
Decimal Form:
15.58845726
…
Answer:
3
Step-by-step explanation:
To find x, we first look at the other the side of the equation that tells us how to figure it out, which, in this case, is by finding the cubed root of 27.
The cubed root of 27 is found through multiplying a certain number by itself three times to give 27, which is commonly known to be 3- which is our x value.
We can check this by multiplying 3 by 3 by 3, mentally or arithmetically.
3 by 3 is 9, and 9 by the final 3 is 27, therefore, 3 is for sure the answer, as cubing 3 gives us 27.
An alternative method we could also use is trial and error. We'd figure it out by trialling each number from one to see if it could present us with 27.
E.g: trialling 2 cubed.
2 by 2 is 4, and 4 by 2 is 8 therefore, it cannot be two as the value is much lesser than 27.
We would then move on to the next number, this being three, we'd trial 3 cubed.
Given data:
Sample size
Sample proportion of people support candidate A:
Population proportion of people support Candidate A :
Check the condition: and
Null Hyposthesis:
Alternative Hypothesis:
The test statistics:
Plug in p=0.56, P=0.40 and n=100 in the above formula,
The table value of z at 10% of significance level is 1.28
Table value is less than the calculated value.
Hence is rejected at 10% level.
Therefore there is the evidence at an alpha level of 10% to conclude that the percentage of people who support candidate A has changed.