I dont think i can do the first one. but for the second one im pretty sure its 10.
Answer:
We conclude that the mean is greater than 25.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 25
Sample mean, 
= 27
Sample size, n = 100
Alpha, α = 0.05
Sample standard deviation, s = 6.5
First, we design the null and the alternate hypothesis
We use One-tailed(right) z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now, 
Since,
We reject the null hypothesis and accept the alternate hypothesis.
Thus, the mean is greater than 25.
Well x^2+10x-3 is a quadratic so we are looking for its lowest point (minimum). If you graph it the answer is (-5, -28) so A. You can do it algebraicallly (x+5)=0. X=-5 and look at -28 for y. Either way you get A as the local minimum/ lowest point of graph.
<span>A conservative investor invests in more short term bonds than long term bonds because they believe long term bonds are not efficient.
</span>Some investors think that bonds are “safe,” , stocks are “risky”.
<span>Short-term bonds on the other hand, seems to be attractive to many investors, specifically the conservative ones because they don't require you to tie up your money for long. </span>
