Question

Which expression represents the area of the rectangle below?

4x4. 7x4

A. 28x4
B. 28x8
C. 11x4
D. 11x8

Answer 1

Answer:28x^8

Explanation:

Area of rectangle = Length*Width

Length = 7x^4

Width = 4x^4

note: when multiplying exponents with equal bases, you can add the exponents together

therefore (7x^4)(4x^4) = 28x^8, which is B