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lana66690 [7]
2 years ago
9

Find two z values so that the middle 65% of the area is bounded by them

Mathematics
1 answer:
Elena-2011 [213]2 years ago
4 0

Answer: Firstly in this question, we need to solve for

α

which is the part of the distribution of which we not looking for.

we can do this with the sum:

α

=

1

−

0.76

=

0.24

as

0.76

=

76

%

we also know that our Standard Normal Distribution is symmetric, so we must divide that

α

to be split on either side of our distribution. so we solve for:

α

2

=

0.24

2

=

0.12

then we find a correlating

z

-score for the value

0.12

and we get that

−

z

=

−

1.175

and

z

=

1.175

This becomes easier to understand when visualized, so observe how we do this sum.

Step-by-step explanation:

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Answer:

StartFraction 7 Over 8 EndFraction of an hour

7/8 hour

Step-by-step explanation:

Total movie time = 3 1/2 hours

Lily turned the movie off One-fourth of the way through,

1/4 of 3 1/2

= 1/4 ×7/2

= 7/8 hour

how much time did she spend watching it.

Time spent watching the movie = 3 1/2 hour - 7/8 hour

= 7/2 - 7/8

= 14-7/8

= 7/8 hour

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5 0
3 years ago
Please help me guys are these true or false​
Varvara68 [4.7K]

Answer:

There are integers that are not rational numbers is false

There are whole numbers that are not rational numbers is false

There are integers that are not whole numbers is true

All rational numbers are integers is false

Step-by-step explanation:

Integers are whole numbers, or numbers that aren't fractions. For example, 1 and 2 are integers, while 5/2 isn't. Integers will always be rational, as rational means that it can be represented as a fraction and the integer 2 can be represented as 2/1 as can 4/2.

Whole numbers are just positive integers.

Not all integers are whole numbers though, since negative integers would not fit the definition of whole numbers (whole numbers have to be positive)

All rational numbers are integers is false, as rational numbers include fractions such as -3/7 or 2/5, which don't cover integers.

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Answer:

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Step-by-step explanation:

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3 years ago
Read 2 more answers
How long it takes a 2800 investment to earn $500 interest if it's invested at 7% compounded quarterly. Round to the nearest tent
OleMash [197]
P=present value of investment = 2800
i=interest per quarter=0.07/4=0.0175
n=number of quarters money invested (to be calculated)
Interest = P[(1+i)^n-1]=500
2800((1+0.0175)^n-1)=500
(1+0.0175)^n=500/2800+1
take log on both sides
n(log(1.0175)=log(1+500/2800)
n=log(1+500/2800)/log(1.0175)
=9.471 quarters
=37.88 months
=37.9 months [ nearest tenth of a month ]

4 0
3 years ago
Plz help me find x and y on the triangle big thanks​
kolezko [41]

Answer:

This is a 30-60-90 right triangle.

<u>The ratio of sides:</u>

  • a : b : c = 1 : √3 : 2

<u>Compare with the given values:</u>

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