The monthly cost of a certain long distance service is given by the linear function c(t)=0.06t + 3.95 where c(t) is in dollars and t is the amount of time in minutes called in a month. find the cost of calling long distance for 140 minutes in a month.

a. $17.95
b. $11.35
c. $8.40
d. $12.35

step-by-step explanation:

in which figure is point g a centroid

what are the statments

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