Is the answer i chose correct? me : )

Arc length = 8π

Step-by-step explanation:

As we know that -

θ = arc length  / radius (r) (i)

As given in the question -

θ = 90°, arc length = 2π,

Put values in equation (i)-

90° = 2 π / r

r = 2 π / 90°

r = 2 × 180°/ 90°

r = 4

Now Circumference of circle = 2 π r

                                                = 2π × 4

                                               = 8π

Hence arc length of circle is 8π.

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you