Final answer:
To multiply the variables 3d, 5d, and 2, you need to multiply the coefficients and add the exponents of the variables. The answer is 30d^2.
Step-by-step explanation:
To multiply the variables 3d, 5d, and 2, we need to multiply the coefficients (numbers) and add the exponents of the variables.
In this case, the coefficients are 3, 5, and 2, and the variable is d. Multiplying the coefficients, we get 3 * 5 * 2 = 30.
To determine the exponent of the variable d, we add the exponents, which are both 1 in this case (since there is an implied exponent of 1 for variables with no written exponent).
Therefore, 3d * 5d * 2 equals 30d2.