A radioactive substance starts with 3400 pounds of substance. It decays at a rate of 35.6% each year. How much of the substance is left after 13 years? A.1.11 lbs
b. 178178.33 lbs
c. .005 lbs
d. 11.14 lbs

what

step-by-step explanation:

gym b charges $1.05 less per hour than gym a.

they aren't great and cause destruction, idk man

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3