To simplify the expression \( (2k^3)(1.5k) \), you can follow these steps:
- Multiply the coefficients: \( 2 \times 1.5 = 3 \).
- Multiply the powers of \( k \): \( k^3 \times k = k^{3+1} = k^4 \).
Putting these together, you get:
\[ (2k^3)(1.5k) = 3k^4 \]
So the simplified expression is \( 3k^4 \).