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after 10 years, Mikes account earned 900 in interest. (If the interest rate is in decimal form) is 0.1, how much did mike initially invest?
without subtraction, solve the formula for the unknown variable in terms of the known variables.



Answer :

Answer:

Let's denote the initial investment amount by P. The formula to calculate the interest earned is given by I = Pxrxt, where:

- ( I ) is the interest earned (900 in this case)

- ( r ) is the interest rate (0.1 in decimal form)

- ( t ) is the time period (10 years in this case)

We need to solve for P using the formula ( I = Pxrxt.

Given:

I = 900

r = 0.1

t = 10

Substituting these values into the formula, we get:

900= Px0.1x10

P= 900/(0.1*10)

P=900

So, Mike initially invested $900

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