Answer: 16590
Step-by-step explanation:
The formula we use to find the sample size is given by :-
, where p = prior estimate of population proportion.
= Critical z-value (Two- tailed)
E= Margin of error .
Let p be the population proportion of cyanobacteria.
Given : E = 0.01
Critical value for 99% confidence interval : 
If Ian does not want to rely on previous knowledge , then we assume p=0.5 because the largest standard error is at p=0.5.
Now, the required sample size = 
Required sample size = 16590
Symbolab has a calculator that solves problems like that and works it out for you, to help understand it better :)
Either way you still have the exact same amount of material length no matter if melted and remolded or simply cut
Answer:
Age Group Number of People 18–24 80 25–31 120 32–38 40 39–45 20
Step-by-step explanation:
The data in each bar is how many people in that group.
So 18-24 has 80 people
25-31 has 120 people
32 -38 has 40 people
39-45 has 20 people
4x-4=3x+17(vert.opp.angles)
x=21
