Answer:
Average of amount of time students spend trying to find an eatery spot on campus.
The sample would be a pool of 100 students to survey from.
Population would be all the students attending Harvard university.
Statistic would be the average amount of time spend looking for eatery spot in campus.
The parameter would be the mean used to find the average amount of time spent looking for eatery spot in campus.
It was a convenient sample.
Step-by-step explanation:
A population is the entire pool from which a statistical sample is drawn. In this case our population is the entire students that attend Harvard University.
A sample is usually drawn from a population. In this case, the 100 students that were drawn from the population is the sample.
The sample was a convenient sample as the sample can be easily drawn from the population population, it doesn't depend on any probability.
Answer:
4/9
Step-by-step explanation:
Let the amount of 95% sol = a ml and
the amount of 30% sol = b ml.
So, the total amount of the compound=a+b=500 ml
As the compound is 50% solution, so
95% of a + 30% of b= 50% of (a+b)
(95/100)a+(30/100)b=(50/100)(a+b) [from equation (i)]
95a + 30b = 50(a+b)
95(a/b)+30 = 50(a+b)/b [dividing both sides by b]
95(a/b)+30 = 50(a/b+1)
95(a/b)+30 = 50(a/b)+50
95(a/b)-50(a/b)=50-30
45(a/b)=20
a/b=20/45
a/b=4/9
Therefore, a:b=4:9
As a+b= 500 ml, so the amount of 95% sol = 
ml
and the amount of 95% sol = 
ml
Hence, the proportion of 95% sol and 30% sol to make a compound of 50% sol must be 4/9.
Answer: the second one
Step-by-step explanation:
Because this equals x > -5
So the circle would be open with the arrow pointing to the right starting at -5
