HELP FAST ITS EASY BUT IDK HOW ITS WRONG ITS ONLY true or false

Mathematics

2 answers:

seropon [69]3 years ago

6 0

Answer:

on p or q put

Step-by-step explanation:

1) p and q true

2) q false

3) p false

4) p and q false

bekas [8.4K]3 years ago

3 0

For the last column try true true true false

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A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a

Brrunno [24]

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.