For the set A= -4 a) list the elements of A
b) find n(A)
c) Is A finite or infinite?
HELP

  a)  A = {-3, -2, -1}

  b)  n(A) = 3

  c)  A is finite

Step-by-step explanation:

a) The elements of A are the integers between -4 and 0, not including those values. Those integers are -3, -2, -1, so those are the elements of set A.

  A = {-3, -2, -1}

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b) n(A) is the number of elements in set A. Obviously, there are 3:

  n(A) = 3

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c) Since n(A) is not "infinity", the set A is finite.

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