To calculate the area of a circle, use the equation a=pir^2 or area=3.14*radius squared
Insert the known values. We need to find the radius of the circle. Since the radius is half of the diameter, divide the diameter by 2 to get the radius.
The diameter is 20.
20/2=10
Area=3.14*10 squared
Area=3.14*100
Area=314 cm
Hope this helps!
<h3>
Answer: Choice C</h3>
Explanation:
This is after using the nCr combination formula
where in this case n = 7 and r = 4. Note how n-r = 7-4 = 3.
We use nCr instead of nPr because the order of the toppings doesn't matter.
Answer: The probability is 0.013
Step-by-step explanation:
Out of 80 people, 28 of them dance with the hands touching the ground.
Then, the probability of selecting at random someone that dances with the hands touching the floor is equal to the number of persons that dance in that way, divided by the total number of persons.
For the first selection, this is p1 = 28/80
now, the probability in the second selection will be 27/79, because we have selected 1 out of the 28 (and also 1 out of the 80)
for the third and the fourth we have:
p3 = 26/78
p4 = 25/77
Then the probability of the fourth events is equal to the product of the four probabilities:
P = (28/80)*(27/79)/(26/78)/(25/77) = 0.013
I think you can use cosine rule if only the lines that form the <52 are equal.
