Answer:
h. 36
Step-by-step explanation:
For a 68.26% confidence, z = 1.0.
Standard deviation (s) = 30 minutes
The sample size needed to assure that the sample mean does not differ from the true mean by more than 5 minutes is given by:
The sample size needed is 36.
Answer:
20%
Step-by-step explanation:
14/70x100=20%
The height of plant y =x+25
Answer:
x=-2
Step-by-step explanation:
add 5x , then subtract 45, then divide by 15