It would be 3.909769126x10^10 hope this helps and all you have to is convert to standard form if you want me to do that ill do it its no problem
the length is given and i got the width as 8 so you just add up all the sides and i got 40
Part B: I think the relation that has the greater value when x=6 is f(x) = 7x - 15 because:
7(6) - 15 = 27 which is greater than the output of 14.
Part C: the value of x would be 3 because:
f(x) = 7x - 15
6 = 7x - 15
+ 15 +15
21 = 7x
3 = x
Sorry if any of this is wrong.
15% of 4,000,751,546,368= 15/100x4,000,751,546,368 = 600,112,731,955.6