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alina1380 [7]
3 years ago
14

The replacement times for DVD players are normally distributed with a mean of 7.1 years and a standard deviation of 1.5 years (d

ata from Consumer Reports). What is the probability that a randomly selected DVD player will be replaced in less than 5 years?  
  In a city, it is estimated that the maximum temperature in June is normally distributed with a mean of 23º and a standard deviation of 5°. Calculate the probability of having a maximum temperature between 20° and 28°.
Mathematics
1 answer:
Nikitich [7]3 years ago
6 0

branily.com//Httpstesxt

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PLEASE SHOW YOUR WORK WITH YOUR ANSWER. Two bags had 50 kilograms of sugar each. After taking out 3 times as much sugar from bag
Svetllana [295]

Answer:

Bag 1: 20

Bag 2: 40

Step-by-step explanation:

Let x be the amount taken out of bag 2

Then the amount left in each bag can be written as:

Bag 1: 50-3x

Bag 2: 50-x

Since we know that half of bag 2 is bag 1, that gives us:

50-3x = 1/2(50-x)

-> 50-3x = 25-x/2

Now lets isolate x and solve:

25 = 5x/2

-> 50 = 5x

-> x = 10

So plug x bag in for the original equations:

Bag 1: 50-3x = 50-3(10) = 20

Bag 2: 50-x = 50-10 = 40

4 0
3 years ago
Melissa's service charge at a beauty salon
satela [25.4K]

Answer:

melissa pays 18.144

Step-by-step explanation:

8 0
3 years ago
According to government birth statistics, the probability of a woman
lyudmila [28]

To find the probability of not having twins, we can subtract the probability of having twins from 1. This is because probabilities always add up to 1.

1 - 0.015 = 0.985

The probability of not having twins is 0.985.

Hope this helps!! :)

3 0
3 years ago
Read 2 more answers
Maria makes a fruit salad. The table shows the amounts of different kinds of fruit that she uses. Kind of Fruit Amount Grapes 3
Lerok [7]

Answer:

1/4

Step-by-step explanation:

i think i might be wrong but im trying im not the best at this but there you go

5 0
3 years ago
Read 2 more answers
The diameter of a clock's face is 6 inches. Find the length of the mirror arc formed by the hands of the clock at 4:00. Round to
Genrish500 [490]
We know that

360°/12 hour-----------> 30°/hour

<span>Central angle at 4 .00 is 120 degrees

the radius of a clock is 6/2-----> r=3 in
length of a circumference=2*pi*r-----> 2*pi*3----> 18.84 in

the minor arc at 4 .00 is  for a central angle of 120</span>°
so
if 360° (full circle)---------> has a length of 18.84 in
 120°----------------------> X
X=120*18.84/360-------> X=6.28 in

the answer is
6.28 in
6 0
3 years ago
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