Answer:
your answer would be OA
Step-by-step explanation:
The rate of change is the same as the slope.
Let's find the slope of function 1 using the Rise Over Run rule.
The rise is 2 and run is 1. So your rate of change is 2/1 or 2 for function 1
Function 2 is a y = mx + b equation, the slope is usually "m" or before the x
y = 1/2x + 7
1/2 is your rate of change for function 2
Answer:
The 90% confidence interval for the true mean lifetime of all batteries of this brand is between 39.3 hours and 41.7 hours. The lower limit is 39.3 hours while the upper limit is 41.7 hours.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.645.
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 40.5 - 1.2 = 39.3 hours
The upper end of the interval is the sample mean added to M. So it is 40.5 + 1.2 = 41.7 hours
The 90% confidence interval for the true mean lifetime of all batteries of this brand is between 39.3 hours and 41.7 hours. The lower limit is 39.3 hours while the upper limit is 41.7 hours.
The CD usually sells for $18.00, and of this price is 10% off, so you would want to first find out 10% of $18.00 is, and subtract that from $18.00
10% of 18.00 is 1.8, so:
$18.00 - 1.8 = $16.20
$16.20 is the price of the CD after a 10% off discount, but you still want to find out the total price with the sales tax.
To find the tax, find 8% of $16.20, and add that amount to $16.20
So:
8% of $16.20 is $1.30
Add $16.20 + $1.30 = $17.50
Thus your final answer is $17.50, which is the total price of the CD, including tax.
Answer:
E
Step-by-step explanation:
-4+9=5 and the only one where y is equal to 5 is E
