Answer:
7
Step-by-step explanation:
area = l x w
area = 9 x 9
area = 81
Hope this was helpful. :-)
Answer:
The answer is 
Step-by-step explanation:
when writing scientific notation, there must be one number to the left of the decimal point.
To achieve this in this problem, you need to move the decimal point 3 times to the right.
because you are moving the point to the right, the exponent will be negative.
*rule of thumb: moving the decimal to the left will give you a positive exponent, moving to the right will give you a negative exponent*
therefore you answer should be written as:

hope this helps :)
The product is equal zero if one of the factors is equal zero.Therefore:
Answer: 21/5
Step-by-step explanation: