Answer:
lower than Amanda: 816 students
Step-by-step explanation:
An equivalent way in which to state this problem is: Find the area under the standard normal curve to the left (below) 940.
Most modern calculators have built in distribution functions.
In this case I entered the single command normalcdf(-1000,940, 850, 100)
and obtained 0.816.
In this particular situation, this means that 0.816(1000 students) scored lower than Amanda: 816 students.
Answer:
<em>The perimeter of the pizza slice is 20.1 cm</em>
Step-by-step explanation:
<u>Perimeter of a Sector of a Circle</u>
The arc length of a sector of a circle of radius r and angle θ is given by:
L = rθ
The angle must be expressed in radians.
The total perimeter of the circular sector, including the two radii, is:
P = rθ + 2r
The pizza slice has a radius of r=7 cm and a central angle of θ=50°
Converting to radians:
![\theta=50*\frac{\pi}{180}=\frac{5\pi}{18}](https://tex.z-dn.net/?f=%5Ctheta%3D50%2A%5Cfrac%7B%5Cpi%7D%7B180%7D%3D%5Cfrac%7B5%5Cpi%7D%7B18%7D)
The perimeter is:
![P = 7*\frac{5\pi}{18} + 2*7](https://tex.z-dn.net/?f=P%20%3D%207%2A%5Cfrac%7B5%5Cpi%7D%7B18%7D%20%2B%202%2A7)
Calculating:
P = 20.1 cm
The perimeter of the pizza slice is 20.1 cm
Answer:
4
Step-by-step explanation:
I could be wrong but it is what it is