Radius = 1/2 * 3 = 1.5 inches
Volume = 1/3 * pi * 1.5^2 * 5 = 11.9 ins^3
Complete question :
The average amount that a college student spends on a textbook is $205 with a
standard deviation of $35. What is the probability that a student spends:
A. between $10 and $310?
Answer:
0.999
Step-by-step explanation:
Mean, m = 205 ; Standard deviation, s = 35
Z = (x - m) / s
x = 310
Z = (310 - 205) / 35 = 3
P(z < 3) = 0.99865
x = 10
Z = (10 - 205) / 35 = - 5.57
P(Z < - 5.5)
P(z < 3) - P(z < - 5.5)
0.99865 - 0
= 0.999
Answer:
23
Step-by-step explanation:
Women total age = 5 x 23 = 115
Men total age = 3 x 24 = 72
The mean age of all the people
= (115+72)÷(8)
= 23.375
= 23 (nearest year)
Answer:
x = 2
Step-by-step explanation:
Given the 2 equations
2x + y = 3 → (1)
5x - 2y = 12 → (2)
Multiplying (1) by 2 and adding to (2) will eliminate the y- term
4x + 2y = 6 → (3)
Add (2) and (3) term by term
(5x + 4x ) +( - 2y + 2y) = 12 + 6 , that is
9x = 18 ( divide both sides by 9 )
x = 2
