Answer:
20%
Step-by-step explanation:
Step 1: Subtract starting value minus the final value (decrease)
Step 2: Divide the decrease by the original number
Step 3: Multiply the result by 100 to get a percent decrease
Therefore, the percent decrease of the price of paper per package is 20%
<em>Note: If the percentage is negative, it means there was an increase and not a decrease.</em>
Answer:
Use a hypothesis test for difference of 2 means
We reject the null hypothesis
Step-by-step explanation:
We will use a hypothesis test for the difference of 2 means, where the population variances are unknown and not assumed equal. (The problem didn't tell us that the variances are equal, so we can't assume they are).
We first need to find the sample means and since we don't know the population variances, we need to find the sample variances as well.
See first attached photo for the calculations of these values...
See second attached photo for the hypothesis test...
Answer: 3x + 8
Step-by-step explanation:
Answer:
$127.68
Step-by-step explanation:
Rate= 6.4%
Principal= $120
Time = 1 year
Required
The final amount A
Step two
A=P(1+rt)
substitute
A=120(1+0.064*1)
A=120(1.064)
A=120*1.064
A=$127.68
Hence the final amount is $127.68