If i want to purchase a bike that cost $12 and is on sale for 25% off how much will the bike cost before tax

$9

Step-by-step explanation:

Step 1:  Find out what 25% of $12 is

  Multiply $12 by 0.25  (0.25 is 25% as a decimal)

     $12(0.25) = $3

     So the sale is for $3 off of the original price

Step 2:  Subtract $3 from the original price

      $12 - $3 = $9,

     So the price before tax will be $9

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²