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Brilliant_brown [7]
3 years ago
7

At about what age does the brain begin "pruning"? a. 1 b. 5 c. 10 d. 70

Mathematics
2 answers:
Aloiza [94]3 years ago
7 0
Correct Answer: Option A

Pruning is a natural process that occurs within our brains. It occurs during the phase when the child has to pass from childhood to adulthood. In simple words it can be said that during Pruning brain removes the extra connections that are no longer needed in the brain. 

Pruning starts at the very early age but continues for several years. So the correct answer to this question is option A. Brain starts Pruning at the age of 1 but most pruning occurs from age 2 to 10.
ra1l [238]3 years ago
4 0
I believe the correct answer from the choices listed above is option A. It is at about 1 year old that the brain begin "pruning". It is thought to be a process   of removing neurons which may have become damaged or degraded in order to further improve the "networking" capacity of a particular area of the brain.
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An insurance company has written 100 policies for $75,000, 500 policies for $25,000, and 1000 policies for $10,000 for people of
schepotkina [342]

Answer:

The company can expect to pay out $45,000 over the year after the policies were written.

Step-by-step explanation:

This can be determined as follows:

The probability that a person will die at age 20 = 0.0015

Revenue from 100 policies = 100 * $75,000 = $7,500,000

Revenue from 500 policies = 500 * $25,000 = $12,500,000

Revenue from 1000 policies = 1000 * $10,000 = $10,000,000

Total revenue from all policies = Revenue from 100 policies + Revenue from 500 policies + Revenue from 1000 policies = $7,500,000 + $12,500,000 + $10,000,000 = $30,000,000

Expected amount to pay out during the year the policies were written = Total revenue from all policies * The probability that a person will die at age 20 = $30,000,000 * 0.0015 = $45,000

Therefore, the company can expect to pay out $45,000 over the year after the policies were written.

4 0
2 years ago
The ratio of the number of fiction books to the number of reference books in a library is 9:5. What is the fraction of the books
Vladimir79 [104]
The fraction of the books that are reference books is 5/14 i think. hope that helps !!
4 0
3 years ago
What property does have to make it more suitable for water pipes than metal pipes?​
Allisa [31]

Answer:

Copper

Explanation:

Copper would be beacuse it's non-toxic, it's antimicrobial, it's rustproof, and it is affordable.

5 0
3 years ago
<img src="https://tex.z-dn.net/?f=%283x3%29%2B%283x5%29-%282x-2%29" id="TexFormula1" title="(3x3)+(3x5)-(2x-2)" alt="(3x3)+(3x5)
MAVERICK [17]
We can simplify this problem by pairing like terms together.

9x + 15x - 2x + 2
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This expression can be simplified down to
22x + 2
8 0
2 years ago
Read 2 more answers
A hardware store clerk mixed nuts worth $1.32 per kilogram with bolts worth $1.20 per kilogram. If he made 108 kilograms of a mi
AlladinOne [14]

Answer:

the way to work these types of problems is to create a table. The table will have three rows and three columns.

The table:

Let x represent the kilograms of nuts, then 138 - x will represent the kilograms of bolts.

Product     Amount        Cost            Total

--------------------------------------------------------

  Nuts          x               .60         .60 * x

  Bolts      138 - x          .66         .66 * (138 - x)

  Mix          138             .65         .65 * (138)

Step-by-step explanation:

The equation:

The nuts plus the bolts must equal the mix or:

.60 * x + .66 * (138 - x) = .65 * 138

I do not like to work with decimals, so multiply each term by 100:

60 * x + 66 * (138 - x) = 65 * 138

Remove the parenthesis and combine like terms:

-6x = -66 * 138 + 65 * 138

-6x = -138

Divide both sides by -6:

x = 23

Solution:

The mixture contains 23 kilograms of nuts.

The mixture contains 138 - 23, or 115 kilograms of bolts.

8 0
2 years ago
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