We need to solve this by PEMDAS.
P=parenthesis,
E=exponents,
M=multiplication,
D=Division,
A=Additions,
S=Subtraction.
First we solve this problem by solving the inside of the parenthesis, 5*3, which is 15. The next step is E, exponents, we use 15 to the second power to get 225, and then we add 3 to the 225, and the total of this problem is 228.
The first term would be 7z4
Answer:
(5c-9-a)/3
Step-by-step explanation:
1. subtract a from both sides to isolate the variable and its coefficient
5c-9-a = 3b
2. divide both sides by 3 to isolate b because 3b/3 = b
(5c-9-a)/3 = b
Answer:
(b)
We can use an estimatior for the population proportion as 
since we don't know previous info. And replacing into equation (b) the values from part a we got:
And rounded up we have that n=1068
Step-by-step explanation:
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since the confidence level is 99%, our significance level would be given by 
and 
. And the critical value would be given by:
The margin of error for the proportion interval is given by this formula:
(a)
And on this case we have that 
and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
We can use an estimatior for the population proportion as since we don't know previous info. And replacing into equation (b) the values from part a we got:
And rounded up we have that n=1068
