Answer:
1.276 × 10^7
Step-by-step explanation:
Just move the decimal until you reach the first number and then count how many times you moved the decimal point. Hope that helps!
Answer:
13
Step-by-step explanation:
(7x3)-2(5+1)+4=13
Answer:
54=9×6
Step-by-step explanation:
54is 9 times 6
Answer: A
Step-by-step explanation:
Answer:
Critical value t-score=2.701.
Step-by-step explanation:
When we calculate a confidence interval with an unknown population standard deviation, we estimate it from the sample standard deviation and use the t-score instead of the z-score.
The critical value for t depends on the level of confidence and the degrees of freedom.
If the sample size is 42, the degrees of freedom are:

For a confidence level of 99% and 41 degrees of freedom, the critical value of t is t=2.701.