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Nadusha1986 [10]
3 years ago
10

A certain brand of light bulb is advertised to last 1600 hours. suppose that the lifetimes of the light bulbs are normally distr

ibuted with a mean lifetime of 1650 hours and a standard deviation of 60 hours. sketch the normal distribution, go out 3 standard deviations.
Mathematics
1 answer:
LenKa [72]3 years ago
8 0

3 times 60= #

# +1650 gives you the answer. Good night!

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Between what 2 consecutive integers does /191 lie
NikAS [45]
I must assume that you meant "sqrt(191)."  

What's the first perfect square greater than 191?  Answer: 196 = 14^2
What's the first perfect square smaller than 191?  Answer:  169 = 13^2

Note how  169 < 191 < 196.  Thus, the square root of 191 lies between 13 and 14.
5 0
3 years ago
Solve each of these equations. Explain or show your reasoning.
Svetlanka [38]

1.

2(x+5)=3x+1 \\2x+10=3x+1 \\-x=-9 \\x=9

2.

3y-4=6-2y \\5y=10 \\y=2

3.

3(n+2)=9(6-n) \\3n+6=54-9n \\12n=48 \\n=\frac{48}{12}=4

Hope this helps.

4 0
3 years ago
A receptionist named Kelsey spends 1 minute routing each incoming phone call. In all, how many phone calls does Kelsey have to r
attashe74 [19]
Wouldn't that be 9 calls then? one minute for each call.
5 0
4 years ago
Read 2 more answers
PLEASE HELP FAST ILL MARK YOU BRAINLYEST
Alborosie

Answer:

look at explanation (I go down the first column of scenarios and then move on to the right column)

Step-by-step explanation:

1) The first one will be same as original because the decrease and increase are the same, and happen right after each other so you get the same amount

2) Second one you get greater than original. You're doubling the initial value, and then decreasing by a smaller percentage, so you still get greater than your initial value

3) Third you get greater than original. You're adding 50% of the initial value, and decreasing by 33.5% of the new value, which will still give you more than the original

4) Fourth, you get greater than original. You're adding 60% of the initial value, and then decreasing by 40% of the new value, which will still give you greater than the initial value

5) Fifth you get less than the original. You're decreasing by 75%, and then adding 50% of the new value, which still gives you less than the initial value

4 0
3 years ago
Find the length of LM if L is the midpoint of NM. NL = 3x + 1, LM = 8x - 24.
SashulF [63]

Answer:

LM = 16

Step-by-step explanation:

From the question given:

L is the midpoint of NM

NL = 3x + 1

LM = 8x - 24

LM =?

Next, we shall determine the value of x.

This can be obtained as follow:

Since L is the midpoint of NM, it means that NL and LM are equal i.e

NL = LM

Thus, we can obtain the value of x as follow:

NL = 3x + 1

LM = 8x - 24

NL = LM

3x + 1 = 8x - 24

Collect like terms

3x - 8x = - 24 - 1

-5x = - 25

Divide both side by - 5

x = -25/-5

x = 5

Finally, we shall determine the length of LM as follow:

LM = 8x - 24

x = 5

LM = 8(5) - 24

LM = 40 - 24

LM = 16

Therefore, the length of LM is 16

8 0
3 years ago
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