Answer:
8
Step-by-step explanation:
2log(x)=log(64)
By logarithms properties
log(x²)=log(64)
When you have log or ln in both sites, you delete them and...
x²=64
7 hours before 2:12 am would be 6:12 pm. Now go forward 30 minutes which is 6:42 pm.
The unit rate is (0.875 mile) divided by (number of hours it takes the turtle to walk the 7/8 of a mile) miles per hour.
Answer:
a: 258.09
b: 178.88
Step-by-step explanation:
For a: Since n > 30, we use a z-value that corresponds to 0.01, or 99% confidence. This z-value is: 2.575
We have:
x = 265, n = 459, σ = 50. See the calculation for the error and the construction of the confidence interval on the first attached photo
For b: Since n > 30, we use a z-value that corresponds to 0.05, or 95% confidence. This z-value is: 1.96
x = 180, n = 308, σ = 10 (it gives σ² = 100. so σ = 10). See the calculation for the error and the construction of the confidence interval on the second attached photo
<u>Answer:</u>
Michelle purchased 25 audio files in January. The percent increase is 60%
<u>Solution:
</u>
Given Data:
Michelle purchases = 25 audio files in January
Again purchased = 40 audio files in February
We need to find the percent increase for the given data.
Step 1:
Use the formula for percent change
,
Step 2:
First we find the amount of change from the question.
Amount of change = 40 – 25
By subtracting, we get 15.
Step 3:
substitute the values in formula we get,
Formula percent change = = 0.6
Percent = 0.6 100 = 60 %.
Result:
Michelle purchased 25 audio files in January. And In February she purchased 40 audio files. Hence the percent increase is 60%.