The expression \( 1.5 \times 1.5 \times 1.5 \times 1.5 \times 1.5 \times 1.5 \) can be rewritten using exponent notation. Since there are six 1.5's being multiplied together, this is equivalent to \( 1.5^6 \).
From the choices provided, the correct equivalent expression is:
B. \( 1.5 \) to the \( 6 \)th power.