When a child is born, her grandfather decides to put $100 in an account that earns

interest. He plans to make no other deposits or withdrawals for 18 years. When

the child turns 18 years old, the money in the account will be a birthday gift.

The

grandfather is choosing between two options:

Option 1: grows by 10.5% each year

Option 2: grows by $20 each year

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus

b.

step-by-step explanation:

i just know

answer: it depends on what the tax percentage