Answer: The answer is d
Step-by-step explanation:
The answer is 1
Use the discramnt formula
Where a is 81, B is 18, and c is 1
We get
We then get 324-324=0
Which equal 0. Since the discramnt produce 0, the number of solution is one and repeated.
Answer: <u>56.9</u> years to <u>63.1</u> years.
Step-by-step explanation:
Confidence interval for population mean (when population standard deviation is unknown):
, where = sample mean, n= sample size, s= sample standard deviation, = Two tailed t-value for .
Given: n= 24
degree of freedom = n- 1= 23
= 60 years
s= 7.4 years
Two tailed t-critical value for significance level of and degree of freedom 23:
A 95% confidence interval on the true mean age:
Hence, a 95% confidence interval on the true mean age. : <u>56.9</u> years to <u>63.1</u> years.
Answer:
2/5
Step-by-step explanation:
1,012,060 The first one is in million 12 in thousands 60 is in the tens
This is place value