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:
5/4
Step-by-step explanation:
10/8 = 5/4
15/12 = 5/4
25/20 = 5/4
They all simplify to 5/4.
Hope this helps!
Step-by-step explanation:
r - 18 = 27
r = 27 + 18
r = 45
...
What you would have to do is take the 18 and double it because 50% doubled is 100% so when you double 18 it is 36
2x times 3x is 6x to the second
2x times -2 is -4x
5 times 3x is 15x
-2 times 5 is -10
6x to the second plus 9x minus 10
