Iwillsueyou69420

assuming you want a circle whose area is pi square units, the area of the hexagon is 6x area of a side length 1 equalateral triangle =ex 3sqrt3/2, so the ratio  circle area/hexagon area is 2pi/3sqrt3. 

Something that might help: 

Cauchy-Schwarz inequality states that

(∑aibi)2≤(∑ai2)(∑bi2)open paren sum of a sub i b sub i close paren squared is less than or equal to open paren sum of a sub i squared close paren open paren sum of b sub i squared close paren

(𝑎𝑖𝑏𝑖)2≤(𝑎2𝑖)(𝑏2𝑖)

.

a square foot is 0.3048 x 0.3048 = 0.09290304 square meters. The wall is 1440 square meters. A gallon covers 0.09290304 x 150 = 13.935456 square meters. So just divide 1440 by 13.935456, which is between 103 and 104(around 103 1/3), so the answer is 104

Or 133 and 79 are relatively prime, so 2

75%x35%=3/4x7/20=21/80 of it's total matches for the season won. you need 19/80, or 19/20 of 1/4, so the answer is 19/20

1/4+1/70+1/77

1/70+1/77=21/770=3/110

3/110+1/4 = 61/220

correct me if i'm wrong!

for 3 it's the easiest find the side lengths ratio - because the pyramid has 3 45-45-90 triangles, and cube it, multiply by 4, and substract from original cube

for 2 there's a formula for volume of a tetrahedron knowing only  all six side lengths - it appears in murdereous maths, and just plug the sidelengths in - inefficient to do that tho

for 1. try find the ratio of the side lengths using the pythogorean theorem, and also properties of equilateral triangles