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dsp73
3 years ago
10

The employees of a firm that manufactures insulation are being tested for indications of asbestos in their lungs. The firm is re

quested to send 4 employees who have positive indications of asbestos on to a medical center for further testing. If 55% of the employees have positive indications of asbestos in their lungs, find the probability that 11 employees must be tested in order to find 4 positives. If each test costs 300 Swedish kronor, find the expected value of the total cost of conducting the tests necessary to locate the 4 positives. Swedish kronor Find the variance of the total cost necessary to locate the 4 positives.

Mathematics
1 answer:
crimeas [40]3 years ago
4 0

Answer:

attached below

Step-by-step explanation:

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Answer:

see below

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The converse flips the then and the if

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3.)

Given: 3x+1=-14 Prove: x=-5

Statements    Reasons

1. 3x+1=-14     Given

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3 0
3 years ago
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8 0
2 years ago
The length of a photograph is 3cm less than twice the width. The area is 54cm². Find the dimentions of the photograph.
AnnyKZ [126]
L=2w-3 

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sub values into quadratic formula
 i attached picture of formula

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w=6

Check:
L=2w-3
=2(6)-3
=12-3
=9
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Therefore the dimensions of the photograph are 6 cm by 9 cm



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Maru [420]

Answer:

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Step-by-step explanation:

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