Answer: A. 1.2
Step-by-step explanation:
Given : Sample size : n= 64
Standard deviation: 
The formula to find the standard error of mean is given by :-

Therefore, the standard error of the mean= 1.2
Hence, A is the right option.
The < is just like and equal sign just looks a little different think of it that was for the first couple steps. So you have 13-3y<-5. First do, -5+13=8. Now you have -3y<8. Then your want to do 8 divided by -3 and you get=-2.666666667 and that equals y.
-2.7=y then make that equal sign into the normal sign again. -2.7
Answers :
- (A) 18.33%
- (B) 21.65%
- (C) about 173.33
- (D) i really have no way of finding the angles for you, you could try to find them yourself; or maybe just leave it blank?
<h3>
OK, so judging from the bar shown : </h3>
It looks like <u>Rent</u> takes up 1/3 of the space so 33.33..%
It also looks like <u>Loan Repayment</u> + <u>Savings</u> is another 33.33..% but Savings is slightly larger than Loan Repayment so you could just estimate Savings to be 55% and LR to be 45% of the 1/3 space.
LR looks equal to <u>Entertainment</u> making it another <u>14.99.</u>
It also looks like Entertainment + Electricity + Groceries = the last 33.33..%
And since we know <u>Entertainment</u> = 14.99 / 45% of 33.33..
Making <u>Electricity and Water</u> <em>ABOUT</em> 35% of 33.33... which is <u>11.66</u>
And Groceries is somehow 20% of 33.33 = <u>6.66</u>
- Rent = 33.33..%
- Savings = 18.33%
- Loan Repayment 14.99%
- Entertainment 14.99%
- Electricity and Water 11.66%
- Groceries = 6.66%
<h3>
All of these added together equal <u><em>
ABOUT</em></u>
100%</h3>
Order of operations are:
<span>1. Parentheses (simplify inside 'em)
2. Exponents
3. Multiplication and Division (from left to right)
<span>4. Addition and Subtraction (from left to right)
So, on your first one:
Parentheses first:8(3+4)-2*8/(5-3)
8(7)-2*8/(2)
There are no exponents so multiplication and division:56-16/2
56-8
Finally, addition and subtraction:56-8=48
Your second problem is a bit more complicated but follows the same rules:
</span></span>

<span><span>
Parentheses first:</span></span>

<span><span>
Now, exponents. Even though they are inside parentheses, we can't go further until we simply those.
(64+81)/5
Now back to parentheses:(145)/5
Division:
145/5=29
Hope that helps</span></span>