Simplify. Express your answer using positive exponents.

Question

4r^2 x 7r

Answer 1

To simplify the expression $4r^2\times 7r$, you can follow these steps:

1. Multiply the coefficients: $4\times 7=28$.
2. Combine the powers of $r$: $r^2\times r=r^{2+1}=r^3$.

Putting it all together, we have:

$$4r^2\times 7r=28r^3$$

Thus, the simplified expression is:

$$\boxed{{\displaystyle 28r^3}}$$