The answer is hollow sphere
Your answer would be <u>176.71</u>
hope this helps!
To factor this quadratic equation into double brackets, you need to find two numbers that add together to equal 10, but also multiply to give you 9. These two numbers can be identified as 1 and 9, which will be the numbers you place in your parentheses as follows:
(x+1)(x+9)
The answer to your question is 7a.
