Answer:
Its incorrect
Step-by-step explanation:
Area is width times height but in this case its 3 numbers so after you did width time height if I'm not mistaken you multiply that number by 4 so you were supposed to multiply 5 and 6 the answer is 30 and then multiply 30 by 4 which is 120 I think.
largest 4 digit number : 9999
smallest 4 digit numbers : 1000
Difference = 9999 - 1000 = 8999
Ok so you have all the information to create an equation.
Here is the equation: A = 7(3)^2 + 2(3)
A=69