How do I add 30% to $100

When the cost is $100 you add 0.30 × $100 = $30

$100 + $30 = $130.

30/100 = 0.30

0.30 x $100 = 30

$30 +$100 = $130

Step-by-step explanation:

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

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