Belk's is having a 20% off sale on pajama pants. if the sale price was 12.50, what was the original price of the pajama pants?

Say the original price is "x", and therefore is the 100% of the price, however Belk's is having a sale and the pants were 20% off, therefore 12.50 is really just 100% - 20% or 80% of the original price.

now, we know 12.50 is the 80%, and "x" is the 100%, what the dickens is "x" anyway?

Hello!

the answer is:

the correct option:

b.

why?

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!

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