3 years ago

Suppose the bank installs nine alarms. What is the expected number of alarms that will detect a burglar?

Mathematics

1 answer:

Harrizon [31]3 years ago

3 0

The answer is 6 because

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20 POINTS!!! PLEASE HELP

Vedmedyk [2.9K]

360=x+x+(2x+3)+(2x+3)
we have 360=2x+2x+2x+6
360-6=6x
354=6x
x=354/6=59
x=59

6 0

2 years ago

Read 2 more answers

You've decided you want a plant for your room. At the gardening store, there are 4 different kinds of plants (tulip, fern, cactu

liraira [26]

6/8 chance should be the answer :)

Hopes this helps, and plz mark Brainliest if correct!!

5 0

3 years ago

there has to be at least one operating path. Once a component fails on a path, that path is no longer operating. The reliability

Eva8 [605]

Answer:

$R = P(R_1) P(R_2|R_1) P(R_3|R_2)*....*P(R_n |R_1,..., R_{n-1}$

For this case the reliability of the sytem would be given by:

$R= \prod_{i=1}^n R_i$

R1= 0.95, R2 =0.95, R3= 0.5, R4 = 0.79 , R5 = 0.6

And replacing we got:

$R = 0.95*0.95*0.5*0.79*0.6= 0.21389$

Step-by-step explanation:

We can assume that the system work in series

If we have in general n units the reliability of the system is the probability that unit 1 succeeds and unit 2 succeeds and all of the other units in the system succeed. fror n units must succeed for the system to succeed. The reliability of the system is then given by:

$R = P(R_1) P(R_2|R_1) P(R_3|R_2)*....*P(R_n |R_1,..., R_{n-1}$

For this case the reliability of the sytem would be given by:

$R= \prod_{i=1}^n R_i$

R1= 0.95, R2 =0.95, R3= 0.5, R4 = 0.79 , R5 = 0.6

And replacing we got:

$R = 0.95*0.95*0.5*0.79*0.6= 0.21389$

8 0

3 years ago

Are the two figures below similar? If so, how do you know?

artcher [175]

No because the scale factor is inconsistent while it would be neccecary to be consistent if it was similar. 19.9/15.3=1.3 while 29/25=1.16 which proves that they have an inconsistent scale factor.

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3 years ago

Tim needs 23 3/4 m of wood trim to remodel a room. Wood trim is sold in lengths of 1 1/4 m. How many pieces of wood trim does Ti

ANEK [815]

1.25x = 23.75
or
(1 1/4)x = 23 3/4

6 0

3 years ago