Answer:
d is the answer
Step-by-step explanation:
perimeter of rect = 2(7+3) = 20
perimeter of square = 4 a =20
a = 5
Which seven?
070,000,000 would be in the 10 millions
700,000,000 would be in the 100 millions
3.6 * 10^(-3) is the scientific notation
Answer:
$1281
Step-by-step explanation:

There are 9 blue marbles.
Step-by-step explanation:
12÷4=3
3×3=9