write the product of the expression 5^4 * 5^-7 using a positive exponent, then write the product using a negative exponent

Answer with positive exponent = or  

Answer with negative exponent =

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Explanation:

The rule we use is

If we multiply two exponential expressions with the same base, then we add the exponents.

The base for each is 5. The exponents 4 and -7 add to -3.

This means

To convert to a positive exponent, we apply the reciprocal to the base. We go from 5, aka 5/1, to 1/5.

So,

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p