What the difference between a whole number, such as 4, and a decimal, such as 4.5

A whole number is a number that doesn't have any fractional parts (or decimals) and is not negative. A decimal is a value that isn't a whole number and written without the use of denominators.

Step-by-step explanation:

Whole numbers don't have any fractional parts (or decimals) and is not negative.

A decimal is a number that is not whole

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)