Answer:
2.3283064
Step-by-step explanation:
Answer:the first option
Step-by-step explanation:
The answer is
*6.340338097E53
Answer:
A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a battery is normally distributed, with a mean of 50 months and a standard deviation of 9 months. If the company does not want to make refunds for more than 10% of its batteries under the full-refund guarantee policy, for how long should the company guarantee the batteries?
The company should guarantee the batteries for 38 months.
Step-by-step explanation:
Using standard normal table,
P(Z < z) = 10%
=(Z < z) = 0.10
= P(Z <- 1.28 ) = 0.10
z = -1.28
Using z-score formula
x = zσ + μ
x = -1.28 *9+50
x = 38
Therefore, the company should guarantee the batteries for 38 months.
Answer:
Step-by-step explanation:
Then the x part of the point takes on the opposite sign that it currently has.
- Right now it is 1. If it takes on the opposite sign, it becomes - 1
- So the new point is (-1,-5).
- Nothing happens to the - 5 when reflected across the y axis.
