Answer:
Step-by-step explanation:
Information given
represent the sample mean for the sample
population mean (variable of interest)
s=4.9 represent the sample standard deviation
n=8 represent the sample size
Confidence interval
The confidence interval for the mean is given by the following formula:
(1)
the degrees of freedom are given by:
Since the Confidence is 0.95 or 95%, the value of 
and 
, and the critical value for this cae would be 
Now we have everything in order to replace into formula (1):
<h3><u>SOLUTION:</u></h3>
Let the length of the room = L = 12m
width of the room = b = 8m
Height of the room = h = 4m
• Area of the four walls of the room = Perimeter of the base x Height of the room.
- Cost of white washing per m² = ₹5
Hence , the total cost of white washing four walls of the room ;-
- Area of ceiling is 12 x 8 = 96m².
Cost of white washing the ceiling.
So , the total cost of white washing ;
- ₹ ( 800 + 480 ) = ₹ 1280 .
Hope this helps you :)
#Carry on learning# :) ..
Answer:
i think it's c
Step-by-step explanation:
12:6 can be done as 4:12 also saying 1:3
The answer is c, 1.825 times 10 to the 8th power
