The correct answer is 600. For area do you Base times height which is 20×30 which equals 60.
It would be 4.4mm/.5 mm x 4 cm = 35.2 cm
Answer:

Step-by-step explanation:
<u>Step 1: Find the square root of 81</u>
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Answer: 
That would be the same as : 10 × (x + 8)
Okay, so it's asking for the product of 10, and the sum of 8 and k. Sum is the answer to an addition problem, so that would make the last of it 8 + k. And we'd be multiplying this with 10, so that would make it : 10 × (x + 8)
63 people should be able to fit in because 7 times 9 is 63.
If I'm wrong, contact me.