Question

simplify and write the answer in standard form
(-5mn^3)(4m^2n^2)

Answer 1

the law for multiplying the same base is add the powers

\[x^a \times x^b = x^{a + b}\]

so for your question you need to use Numbers, Letters Powers Signs

\[(-5mn^3)(4m^2n^2) = -5 \times 4m^{1 + 2}n^{3 + 2}\]

just simplify it from here.

hope it helps