Apply properties of operations to multiply 5A power to b purified c power 3. - 4a power 7c power 5 is it 20a power 14 b r 5 c r 15 - 20

To multiply the terms, we first multiply the coefficients and then add the exponents of like variables.

(5A^b*c^3) * (-4A^7*c^5)
= 5 * (-4) * A^(1+7) * c^(3+5)
= -20 * A^8 * c^8

So, the result of multiplying 5A^b*c^3 and -4A^7*c^5 is -20A^8*c^8.