Sue Lynn is driving at a constant speed to visit her friend 200 miles away. The following table shows her possible rates of speed and time it will take her to reach her friends house.
Speed in mph
Time in hours
20
10
25
8
40
5
50
4
у

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

correct answer was 0.5

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