Request edit ac 1. Suppose that the water level of a river is 34 feet and
that it is receding at a rate of 0.5 foot per day. Write an
equation for the water level, L, after d days. In how
many days will the water level be 26 feet?
Verbal:
Numeric:
I
I
Graphic:
Algebraic:

the answer is  

a.

28 ft2

step-by-step explanation:

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

your answer would be b