Answer: The point estimate of the population mean is <u>25</u>.
The margin of error for the confidence interval is <u>3</u> .
Step-by-step explanation:
The confidence interval for population mean is given by :-
, here 
is the point estimate of the population mean and E is the margin of error .
As per given , we have
Lower bound of CI = 
(1)
Upper bound of CI = 
(2)
Add (1) and (2) , we get
Subtract (1) from (2) , we get
Hence, the point estimate of the population mean is <u>25</u>.
The margin of error for the confidence interval is <u>3</u> .
The equations of both the sister are the same.
<h2>Expression
</h2>
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations that are formed according to rules which are dependent on the context.
<h2>Given to us</h2>
Gabriel Equation: 
,
Gabriel's Sister Equation: 
,
<h3>Gabriel's Sister Equation</h3>
On further solving the equation we get,
As we can see the equation transformed to Gabriel's Equation of total cost.
Therefore, both the sisters are correct as the equations of both the sister are the same.
Learn more about Expression:
brainly.com/question/13947055
Answer:
$39
Step-by-step explanation:
To calculate the total cost of his meal, add the subtotal ($30), the tax on subtotal ($30 X 10%) and the tip ($30 X 20%).
Convert all percentages to decimals to multiply.
Finding tax:
10% = 0.1
Tax = $30 X 0.1 = $3
Finding tip:
20% = 0.2
Tip = $30 X 0.2 = $6
Subtotal + Tax + Tip
= $30 + $3 + $6
= $39
The total cost of his meal was $39.
Answer:
use socartic for help
Step-by-step explanation:
$24500 multiply by 27%= $6,615
There , $24500( initial price ) + $6,616= $31,115 ( as the new price).
