Determine the sign of the product of -10.4 x -78.2.

The product of -10.4 and -78.2 is 811.68. Since both numbers are negative, the product is positive.

Multiply 82 x (-13)

The product of 82 and -13 is -1066.

To determine the sign of the product of -10.4 x -78.2, you need to remember the basic rule of multiplying two negative numbers. When you multiply two negative numbers, the product is positive.

Therefore, the sign of the product -10.4 x -78.2 is positive (+).

To determine the sign of the product of -10.4 and -78.2, you need to remember the rules of multiplying positive and negative numbers.

When multiplying two numbers with the same sign, whether both positive or both negative, the product will always be positive.

In this case, -10.4 and -78.2 have the same sign, which is negative. Therefore, the product of -10.4 and -78.2 will also be positive.