Answer this question to get marked as brainliest

Part A     A.  400 sq ft.

Part B     A.   509 sq ft

Step-by-step explanation:

Part A

Area of square = side squared

Since all the sides of the square are congruent and the perimeter is 80, then the length of each side is 80/4 = 20

A = 20^2 = 400 sq ft

Part B

C = πd

80 =

80/π = d

r = d/2 = 80/2π = 40/π

A = πr^2 = π(40/π)^2

   = 1600π/π^2 = 1600/π = 1600/3.14 = 509 sq ft

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

homozygous. one is homozygous, while two is heterozygous.