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motikmotik
3 years ago
10

Please help for a quick, easy 20 points.

Mathematics
1 answer:
fiasKO [112]3 years ago
4 0

Answer:

A is true.

B is true.

C is true.

D is false.

E is true.

F is false.

G is false.

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The life expectancy (in hours) of an electric bulb is normally distributed with a mean of 5000 and a standard deviation of 1000.
Sergeu [11.5K]

Answer:

P(z>1.3) = 0.9032

Step-by-step explanation:

We are given:

Mean = 5000

Standard deviation = 1000

x = 6300

P(x>6300)=?

z-score =?

z-score = x- mean/standard deviation

z-score = 6300 - 5000/1000

z- score = 1300/1000

z-score = 1.3

So, P(x>6300) = P(z>1.3)

Looking at the z-probability distribution table and finding value:

P(z>1.3) = 0.9032

So, P(z>1.3) = 0.9032

7 0
3 years ago
Find the midpoint of (6, 4), and (0,2).
Gnesinka [82]

Answer:

(3,3)

Step-by-step explanation:

Using the midpoint formula:

m=\left( \dfrac{6+0}{2},\dfrac{4+2}{2} \right)=\left( \dfrac{6}{2},\dfrac{6}{2} \right)=(3,3)

Hope this helps!

8 0
3 years ago
Read 2 more answers
Find the value of the trigonometric ratio. Make sure to simplify the fraction if needed. plss help
Natalija [7]

Answer:

3/5

Step-by-step explanation:

sinA = opp/hyp

= 21/35

= 3/5

8 0
3 years ago
Lisa is making cookies but she only has three cups of sugar she needs 1 and 2/3 cup of sugar for the cookies and 2/3 cup of suga
aliya0001 [1]

Answer:

she has 2/3 cup left

Step-by-step explanation:

1 and 2/3 + 2/3 =2 and 1/3 what is left??

2/3

7 0
3 years ago
Eli lives 3 3/4 miles from the library. He decided to bike from his home to the library to return some books. Eli biked 1 1/10 m
KIM [24]
Eli traveled a total of 8.6 miles. He went to the library and back. 3.75 + 3.75. and he also added and extra 1 1/10 mile. so, 3.75 x 2 = 7.5, 7.5 + 1 1/10 = 8.6. Hope that helped!
7 0
3 years ago
Read 2 more answers
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