Suppose a spider moves along the edge of a circular web at a distance of 3 cm from the center.?
(a) if the spider begins on the far right side of the web and creeps counterclockwise until it reaches the top of the web, approximately how far does it travel?
distance:
(b) if the spider crawls along the edge of the web a distance of 1 cm, approximately what is the angle formed by the line segment from the center of the web to the spider's starting point and the line segment from the center of the web to the spider's finishing point?

angle:

a)  d = 4,712 cm

b) ∠ 108,52 ⁰

Step-by-step explanation:

The crcular path of the spider has radius = 3 cm

If the spider moves from the fa right side of the circle its start poin of the movement is P ( 3 , 0 ) (assuming the circle is at the center of the coordinate system. And the top of the web (going counterclockwise ) is the poin ( 0 , 3 )

So far the spider has traveled 1/4 of the circle

The lenght of the circle is

L = 2*π*r

The traveled distance for the spider (d) is

d = (1/4 )* 2*π*r       ⇒       d = (1/2)*3,1416*3      ⇒  d = 4,712 cm

And now spider go ahead a new distance of approximately 1 more cm

Therefore the spider went a total of 5.712 cm

Now we know that

πrad  =  180⁰    then   1 rad = 180/π         ⇒   1 rad  = 57⁰

rad = lenght of arc/radius  

so  5,712/3    =  1.904 rad

By rule of three

       1 rad           ⇒    57⁰

     1.904 rad     ⇒     ? x

x = 57 * 1.904      ⇒   108.52 ⁰

So the ∠ 108,52 ⁰

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

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step-by-step explanation: