Final answer:
To find the area of Alexander's bedroom, multiply the length (10 feet) by the width (7 feet) to get 70 square feet.
Step-by-step explanation:
Alexander wants to find the area of his bedroom. Given that one side measures 10 feet and the other side measures 7 feet, we can calculate the area of a rectangle by multiplying its length by its width. Therefore, the area of Alexander's bedroom is 10 feet multiplied by 7 feet, which equals 70 square feet.
To find the area of Alexander's bedroom, we can use the formula for the area of a rectangle, which is length multiplied by width. In this case, the length is 10 feet and the width is 7 feet.
So, the area of Alexander's bedroom is 10 feet multiplied by 7 feet, which equals 70 square feet.