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AlexFokin [52]
3 years ago
6

lavatory tests show that the lives of light bulbs are normally distributed with a mean of 750 hours and a stoandard devotion of

75 hours. Find the porbability that a randomly selected light bulb will last between 900 and 975 yours
Mathematics
1 answer:
maria [59]3 years ago
5 0

Answer:h

Step-by-step explanation:6

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Could u help me with these 3 questions? Ill mark brainly if its correct. :)
Kazeer [188]
Answer is

2. 15
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3 0
3 years ago
Simplify the expression. 12x^-6 y^10 times 3x^7 y
Vlada [557]

We need to simplify the expression:

12x^{-6}y^{10} \times (3x^{7}y)

Now, we know that we can resolve the exponents of the variables with the like terms only and we can multiply the coefficients independently:

Now,  

12x^{-6}y^{10} \times 3x^{7}y=(12 \times 3)\times (x^{-6}\times x^{7})\times (y^{10}\times y)

On simplifying the above expression we get:

36\times x^{(-6+7)}\times y^{(10+1)}

=36 \times x^{1}\times y^{11}

=36 \times x \times y^{11}

=36xy^{11}

So the simplified form of the expression 12x^{-6}y^{10} \times 3x^{7}y=36xy^{11}.

7 0
3 years ago
:)
vitfil [10]

Answer:

45-(-15)

430-(-180)

11,560-(-185)

Step-by-step explanation:

just add the two numbers together for diffrence.

6 0
3 years ago
If the height of a triangle
Dvinal [7]

Answer:

75 cm

Step-by-step explanation:

To find the area of a traingle you use the following equation

b*h*.5

We know that the height of the triange is three times the base and that the area is 937.5

This means that

b*3b*.5=937.5

We can combine this and get 1.5b^2=937.5

We can then divide by 1.5 to get b by itself

b^2=625

Then take the square root for our answer and get b=25 (while be also can be -25 it doesn't make sense to have a negative answer in the context of this problem)

So we know that b=25 and that h=3b which means that the height is 75 cm

5 0
3 years ago
You are planning on making 250 liters of chili for a big fundraiser you are throwing. You want the
Anvisha [2.4K]

Answer:

30%

Step-by-step explanation:

because you use %

so that is why i think but i am not sure

7 0
3 years ago
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