Mathematics, 08.12.2020 21:50 mawawakaiii

# HEL ASAP
The keyboard life is normally distributed with a mean of 8 years with standard deviation

1.8 years.

The manufacturer will replace any such keyboard that wears out during the guarantee period.

The life of such keyboard is normally distributed.

a) If the guarantee period is 6 years, what percent of such keyboard will the manufacturer have to

replace?

b) How long should the guarantee run if the manufacturer wishes to replace no more

than 4.01% of keyboards?

Answers: 2

Mathematics, 21.06.2019 20:20

The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?

Answers: 2

HEL ASAP
The keyboard life is normally distributed with a mean of 8 years with standard deviation

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