Given that the mean is $9.5 and the standard deviation is $1.30, the standard error will be given by:
σ/√n
where
σ-standard deviation
n=sample size
thus, we shal have:
1.30/√20
=0.2906
Next we find the margin error
0.2906*2=0.581
thus the confidence interval will be:
(9.5+0.581, 9.5-0.581)
=(10.081,8.919)
I will have $2721 at the beginning of the eighth year.
The beginning of the eighth year is the end of <em>seven years of investing</em>.
The formula for the future value (FV) of my investment is
FV = <em>C</em>(1 + <em>r</em>)^<em>n</em>
where <em>C</em> = my initial cash
<em>r</em> = the interest rate
<em>n</em> = the number of years
FV = $2000(1.045)^7 = $2722
Part 1 :
She invested $6000 in a bond. (So She Has $6000) , at a yearly rate of 3% ,
Part 2 :
She earned $450 in Interest. How long was the money invested?
At a yearly rate of 3% She earned $450. What Sum/Total/addition/and division problem add these to ratio's up?
It should come to about a 2 year Savings account , for interest.
Dose this help?
Answer:
a = 50°, b = 130°, c = 20°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the 3 angles in the right triangle
a + 40° + 90° = 180°
a + 130° = 180° ( subtract 130° from both sides )
a = 50°
a and b are adjacent angles and sum to 180° , so
a + b = 180°
50° + b = 180° ( subtract 50° from both sides )
b = 130°
Then sum the angles in the top triangle, that is
30° + 130° + c = 180°
160° + c = 180° ( subtract 160° from both sides )
c = 20°
445 yards is equal to 0.253841 Miles
445 yards > 1/4 miles
Trish ran farther by 5 yards
