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DaniilM [7]
2 years ago
7

The life spans of elephants in a Columbus zoo are normally distributed. The average elephant lives 60 years: the standard deviat

ion is 2 years. Find a range of elephant's life spans which lies within 1 standard deviation, about 68% Between 58 and 62 years Between 56 and 64 years Between 54 and 66 years Between 50 and 60 years
Mathematics
1 answer:
Marta_Voda [28]2 years ago
5 0

did u ever get the answer l need it


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Rewrite the equation by completing the square. 4 x^{2} +20x +25 =0
Ede4ka [16]

Answer:

(x+5/2)^2 = 0

Step-by-step explanation:

4 x^{2} +20x +25 =0

Divide by 4

4/4 x^{2} +20/4x +25/4 =0

x^2 +5x +25/4 =0

Subtract 25/4 from each side

x^2 +5x +25/4 -25/4 =-25/4

x^2 +5x  =-25/4

Take the coefficent of x

5

Divide by 2

5/2

Square it

25/4

Add it to each side

x^2 +5x +25/4 =-25/4+25/4

(x+5/2)^2 = 0

Take the square root of each side

x+5/2 = 0

x = -5/2

8 0
2 years ago
Read 2 more answers
What is the larger unit for 377 When You count from 368 to 500
Gre4nikov [31]

Answer:

500 - 368 = 132This means that to reach 500 from 368, you will need to count 132 ones.132 can be written in several ways including:132 = 100 + 32132 = 100 + 30 + 2For the first one:the count will be 1 one hundred and 32 units to reach 500 from 368For the second one:the count will be one hundred, 30 tens and 2 ones to reach 500 from 368

Read more on Brainly.com - brainly.com/question/725998#readmore

Step-by-step explanation:

8 0
3 years ago
Pls help and quick I’m running out of time
Rus_ich [418]
108 i really hope this help :)

3 0
3 years ago
Side note: It’s ratio math
Elanso [62]

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5 0
3 years ago
You make a $15 payment on your loan of $500 at the end of each month
lara [203]

Answer:

2.8 years or 33.6 months.

Step-by-step explanation:

I am not sure what your questions is, but I assume it is how long it will take to pay it off?

In a year (15*12,) you would have paid $180 of it.

x = 500/180

Therefore, it will take you approximately 2.8 years to pay off your loan, excluding interest, of course, since you did not provide that rate.

8 0
2 years ago
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