Answer:
D = 9.85 units
Step-by-step explanation:
A (1,7) and B(10,3)
Using Distance Formula to find the length
=> Distance Formula =
=> D =
=> D =
=> D =
=> D =
=> D = 9.85 units (Upto 3 sfs)
In this problem, given the focus at (2,4) and directrix at y = 8. then it is implied that the parabola is facing downwards. The vertex hence is at the middle of the focus and the directrix, hence at (2, 6). The general formula of the parabola is y-k = -4a ( x-h)^2. Substituting, y -6 = -1/8 *(x-2)^2. Answer is A.
The answer is 48 because you have to do is 21 x 4 which is 48
Yes, it is better to switch your choice.
At first, you had a 1/3 chance of wining a car.
Then the professor eliminated an option.
Now you are left with either a goat or a car.
Now instead of having a 1/3 chance, you have a 1/2 chance of selecting the car.
This is famous for the Monty Hall Problem: https://www.youtube.com/watch?v=mhlc7peGlGg
Answer:
Step-by-step explanation:
step 1
Find the area of the circle
The area of the circle is equal to
we have
substitute
step 2
we know that
The area of a circle subtends a central angle of 2π radians
so
using proportion
Find out the area of a sector with a central angle of 8 π/11 radians