Answer:
24.8 mins
Step-by-step explanation:
Time > timemark > frequency
0 – 10 > 10/2 = 5 > 5
10 – 20 > (10+20)/2 = 15 > 15
20 – 30 > (20+30)/2 = 25 > 13
30 – 40 > (30+40)/2 = 35 > 10
40 – 50 > (40+50)/2 = 45 > 7
The mean time for the 50 people is given by:
Mean = summation (mid time x frequency) / total frequency
Mean = [5x5 + 15x15 + 25x13 + 35x10 + 45x7] / 50
Mean = [25 + 225 + 325 + 350 + 315] / 50
Mean = 1240 / 50
Mean = 24.8 mins
Answer:
y = -x + 4
Step-by-step explanation:
(x₁,y₁)= (5, - 1) & (x₂,y₂)= (2 , 2)
Slope = 
![\frac{2-[-1]}{2-5}\\\\=\frac{2+1}{-3}\\\\=\frac{3}{-3}\\\\= -1](https://tex.z-dn.net/?f=%5Cfrac%7B2-%5B-1%5D%7D%7B2-5%7D%5C%5C%5C%5C%3D%5Cfrac%7B2%2B1%7D%7B-3%7D%5C%5C%5C%5C%3D%5Cfrac%7B3%7D%7B-3%7D%5C%5C%5C%5C%3D%20-1)
m = -1
Equation of the line y - y₁ = m(x - x₁)
y - [-1] = (-1)*(x - 5)
y + 1 = -x + 5 {-1 is distributed}
y = -x + 5 - 1
y = -x + 4
Answer:
2827.433
Step-by-step explanation:
First start with the volume of a sphere and use the given volume to solve for the radius r.
So the radius of this sphere is 15 inches.
Now we use this radius to find the surface area
And then you get 2827.433
