Answer:
0.2839 = 28.93%
Step-by-step explanation:
In order to find find the probability that one car chosen at random will have less than 68.5 tons of coal, we have to find z
Le x be tons of coal in a car
Z = (x – mean)/standard deviation
Z = (x – μ)/ σ
P (x<68.5) = P(z < (68.5-69)/0.9)
P (x<68.5) = P(z < -0.5555)
Then we use the z table to find the area under the curve.
P (x<68.5) = 0.2893
Answer:
Double a number increased by half the same number
Step-by-step explanation:
C=2•pi• R
D=6 then the radius is 3
2•Pi•3 =18.85
Answer: The constant of proportionality is 5 because the equation would be y=kx but instead of k it has 5.
