Answer:x^(2)+2x-14=0
Step-by-step explanation:
The answer would be 160in. Just multiply 20 x 8 (I think)
Answer: A. 1.2
Step-by-step explanation:
Given : Sample size : n= 64
Standard deviation: 
The formula to find the standard error of mean is given by :-

Therefore, the standard error of the mean= 1.2
Hence, A is the right option.
Answer:
148
Step-by-step explanation: