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
10 would be 50% so 1 is 5% 5x8 =40
Her experimental probability is 40%
Answer:
Step-by-step explanation:
c=cookies
b=brownies
2c+3b=9.50 > Briana
10c+6b=20.50 > Nevaeh
Answer:
Step-by-step explanation:
Given: The time taken to do each activity from Colin's house to his hotel in given.
- he drove to the airport for 45 minutes
- he waited at the airport for the flight to depart for 90 minutes
- his fight duration was 70 minutes
- upon landing, he gathered his luggage for 20 minutes
- he drove to the hotel for 35 minutes
To Find: what is true of any expression that represents the total time Collin spent traveling from his house to the hotel
Solution: Any expression will involve the sum of all the durations of his various activities i.e., 260 minutes or 4 hours and 20 minutes.
Explanation:
As each of the activities described is an independent activity that does not overlap, we can easily sum up the durations of each to find the total time Collin took from his house to the hotel.
We add it as follows :
he drove to the airport for 45 minutes + he waited at the airport for the flight to depart for 90 minutes + his fight duration was 70 minutes + upon landing, he gathered his luggage for 20 minutes + he drove to the hotel for 35 minutes.
So, 45+90+70+20+35 = 260 minutes
which means it took a total of 260 minutes or 4 hours and 20 minutes from Collin's house to his hotel.
