ITS LITERALLY LIKE 400 !!
I'm horrible at this so I'm just guessing.
X is the variable and x means multiplication symbol.
X + (X x 3 - 1) + (X x 3 - 1) - 4) <span>≥ 45 is the answer I got.
The answer to that inequality would be
X </span><span>≥ 7 I think.</span>
Answer:
b. 2.01 < σ < 2.81
Step-by-step explanation:
The 90% confidence interval for the population standard deviation is calculated as:
< σ < 
Where n is equal to 51, s is equal to 2.34, 
is 10%, 
is the value for the Chi squared distribution with n-1 degrees of freedom that has a probability of 
in the right tail and 
is the value for the Chi squared distribution with n-1 degrees of freedom that has a probability of 
in the right tail.
So, replacing n by 51, s by 2.34, by 67.50 and by 34.76, we get that the The 90% confidence interval is equal to:
< σ <
2.01 < σ < 2.81
<span>$119.05
Eva follows the bond market and often purchases bonds issued by Sanden Research Labs. Last year, she purchased three such bonds in January, one in May, and four in June, then sold them all in November. Sanden Research Labs bonds were selling at 78.430 in January, 95.652 in May, 86.220 in June, and 87.454 in November. If each bond she purchased had a par value of $500, how much profit did Eva gain from buying and selling these bonds?</span>
