I think it's Acute i hope it's right.
Answer:
.
Step-by-step explanation:
Given : Sample size : n= 64 , the sample is a large sample (n>30), so we can apply z-test.
Sample mean = 
Standard deviation : 
Level of confidence:

Then, critical z-value =
The confidence interval to estimate the population mean is given by :_


Hence, the 95% confidence interval to estimate the population mean can be computed as
.
Answer:
I dunno
Step-by-step explanation:
2x + 10 = 4x + 10
2x - 4x = 10 - 10
- 2x = 0