Round the numbers to the nearest cent and then to the nearest dollar. 23. $62.756 24. $38.415

23.  $ 62.76  to the nearest cent

      $63.00 to the nearest dollar

24.  $ 38.42  to the nearest cent

      $38.00 to the nearest dollar

Step-by-step explanation:

When we round to the nearest cent we round the second number after the decimal.  We look at the third number after the decimal.  If it is 5 or above we round up.

When we round to the nearest dollar, we round the number befroe the decimal. We look at the number after the decimal.  If it is 5 or above we round up.

23.  $62.756  we round the 5 so we look at the 6   6>= 5  so we round up

         $ 62.76  to the nearest cent

    $62.756  we round the 2 so we look at the 7  7>= 5  so we round up

          $63.00 to the nearest dollar

24. $38.415 we round the 1 so we look at the 5   5>= 5  so we round up

         $ 38.42  to the nearest cent

    $38.415  we round the 8 so we look at the 4  4< 5  so we leave alone

          $38.00 to the nearest dollar

21.6 units.

Step-by-step explanation:

Work out the length of 2 adjacent sides:

length = sqrt ((-4- -1)^2 + (3-5)^2)

= sqrt (9 + 4)

= sqrt (13)

Adjacent side = sqrt ((-1-3)^2 + (5 - -1)^2)

= sqrt (16 + 36)

= sqrt 52.

The perimeter = 2 sqrt13 + 2sqrt52

= 21.63 units.