CoolBird2006

@ElectricPavlov Thank you for working out this question!

10 is the answer.

1048576

The answer is 463 feet.

11 is the answer.

n = 20

(a).$\sqrt{3} \over 4$

(b).$1 \over 2$

(c).$\sqrt{3} \over 4$

$ab + c = bc + a\\ ab - bc = a-c \\ b(a-c) = a-c \\ b(a-c) - (a-c) = 0\\ (a-c)(b-1)=0\\ a=c\\ b=1$

Therefore, a and c must equal to 6.5, though the question states that all of these numbers are integers.

$6p^6 \times q^4 + 15p^4 \times q^2 + 3p^4 \times q^3 + 9p^5 \times q^2$

$j = {\pm \sqrt {32} - 3}$