Answer
given,
SAT is 500 with a standard deviation of 100.
a sample of 400 students whose family income was between $70,000 and $80,000 had an average verbal SAT score of 511.
sample mean = 
= 
= 5
95% confidence level is achieved within +/- 1.960 standard deviations.
1.960 standard deviations x 5 is equal to +/- 9.8
confidence interval = 511 - 9.8 --- 511 + 9.8
= 501.2-----520.8
Answer:
a. 
b. 
c. 
d. 
Explanation:
To make analysis about the satellite circular earth the depends or r and A


a.


b.


c.



d.


Answer:
If the mass is doubled the frequency will be multiplied by 4
I think it’s by using a magnet because metals are magnetic