Mathematics: A stock with an initial cost of $20 per a share doubled its price per a share every year for 3 years. What is the price per a share after 3 years? A) $240 B) $160 C) $180 D) $120

,2x = -38 -4 2x = 38+4 2x = 42 x = 42 -2 x = 40...

A stock with an initial cost of $20 per a share

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19.01.2022

Option B: $160 is the price per a share after 3 years.

Explanation:

The initial cost per share in a stock is $20

Each year the value of the share is doubled its price.

We need to determine the price per a share after 3 years.

The price per share after one year is given by

1st year = Initial cost × double its price

$=\$20\times2$

$=\$40$

Thus, the price per a share after 1 year is $40

The price per share after 2 year is given by

2nd year = Initial cost after year 1 × double its price

$=\$40\times2$

$=\$80$

Thus, the price per a share after 2 years is $80

The price per share after 3 year is given by

3rd year = Initial cost after year 2 × double its price

$=\$80\times2$

$=\$160$

Thus, the price per a share after 3 years is $160

Hence, Option B is the correct answer.

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