Answer:
(a) x = -1.10 and x = 1.10
Step-by-step explanation:
A straightforward square root will give the value of x.
<h3>Solution</h3>
Divide by the coefficient of x^2:
x^2 -30/25 = 0
x^2 -1.20 = 0
Add 1.20, and take the square root.
x^2 = 1.20
x = ±√1.20 ≈ ±1.0954
x ≈ -1.10 and 1.10 . . . . . round to hundredths
__
<em>Additional comment</em>
For small values of x, the root of (1+x) is approximately 1+x/2. For a root accuracy to the nearest hundredth, x < 0.21 (as here). For accuracy to the nearest thousandth, x < 0.064.
3 and 3/5
I believe thats a mixed number .. sorry its been so long
Answer:
"A - $32.50"
Step-by-step explanation:
So, 0.40 per share for 100 shares is:
Decrease of 0.40 * 100 = $40
Also, 0.25 per share for 30 shares is:
Increase of 0.25 * 30 = $7.5
So, decreased by 40 and increased by 7.5 means Total Decrease of 40 - 7.5 = $32.5
Answer choice A is right.
The 99% confidence interval for the true mean is given by:
where:
is the sample mean = 69.7
is the standard deviation = 2.8
is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.
Therefore, the 99% confidence interval is:
