Answer:
260.0234 cm
Step-by-step explanation:
The formula for area of a circle is π r².
Since the radius is half of the diameter, we must divide the diameter by 2.
18.2/2 = 9.1
Next, we must multiply 9.1 x 9.1.
This gives us 82.81
Now we must multiply 82.81 by pi (3.14).
82.81 x 3.14 = 260.0234
Therefore, the area of the circle is 260.0234.
Answer:
The investment amount is approximately $63
Step-by-step explanation:
Formula:-
Simple interest I = PNR/100
P - Principle amount
N - Number of years
R - Rate of interest
It is given that,
To find the amount to be invest
we have,
P = ? N 14 months = 7/6 years and R = 3%
P + PNR/100 = 65
P[1 + NR/100] = 65
P[1 + (7*3)/(6*100)] = 65
P[1 +7/200] = 65
P[207/200] = 65
P = (65*200)/207 62.801 ≈ 63
Therefore the investment amount is approximately $63
Answer:
A - Here is your answer that you asked without clues
Answer:
The complete question is:
At a university, 13% of students smoke.
a) Calculate the expected number of smokers in a random sample of 100 students from this university:
b) The university gym opens at 9 am on Saturday mornings. One Saturday morning at 8:55 am there are 27 students outside the gym waiting for it to open. Should you use the same approach from part (a) to calculate the expected number of smokers among these 27 students?
Part a is easy, because is a random sample, we can expect that just 13% of these 100 students to be smokers, and 13% of 100 is 13, so we can expect 13 of those 100 students to be smokers.
b) This time we do not have a random sample, our sample is a sample of 15 students who go to the gym in the early morning, so our sample is biased. (And we do not know if this bias is related to smoking or not, and how that relationship is), so we can't use the same approach that we used in the previous part.
A binomial is going to have two terms. =)
