Answer:
Step-by-step explanation:
Let X be the mean lifespan of automobile tire
X is N(36,000, 2450)
The Z scores are calculated as (x-36000)/2450
x x-36000 Z=(x-36000)/2450
34000 -2000 -0.816326531 =-0.82
38000 2000 0.816326531 =0.82
31000 -5000 -2.040816327 =-2.04
No only if beyond |3| z score is there we say unusual
For 33550 miles
Z = -1
P(Z<-1) = 0.3413
So percentile is 34.13
For 36000 , z=0 so 50th percentile
Answer: smaller x = -4/3
larger x = -1
Step-by-step explanation:
3 2/5 is the mixed number in simplest form because you cannot reduce it.
Answer:
Enlargement
Step-by-step explanation:
The area is bigger
Answer: D) 10 jerseys
Step-by-step explanation:
Let j represent the number of jerseys and C for total cost
Local company eqn: C = 5.25j + 45
Online company eqn: C = 7.75j + 20
Set both sides equal to solve:
5.25j + 45 = 7.75j + 20
5.25j - 7.75j = 20 -45
- 2.5j = -25
j = 10
Therefore, the cost is the same for both companies when 10 jerseys are sold