Answer:
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Step-by-step explanation:
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First, start out by inserting the numbers:
3.14(4(2) (4^2) + 4(2)
Next, multiply the given numbers:
3.14(8 (4^2) + 8)
Then, multiply 4^2 (since the exponent is 2, multiply 4 two times: 4 * 4):
3.14(8 (16) + 8)
Now, multiply the first 8 to 16:
3.14(128 + 8)
Use the distributive property to solve this next one:
401.92 + 25.12
Finally, add up you two decimals:
427.04
You should get 427.04 (I could be wrong though).
Hopefully that helped! :)
248
<span>windows on first floor = 52
</span>
<span>windows on 8th floor (52 - 6 * 7) = 10
</span>
<span>average windows = (52 + 10)/2 = 62/2 = 31
</span>
<span>8 floors * 31 average windows = 248.</span>
-8 and -7, I used guess and check