You have to pay the 90$ we all ready know it’s over 90. 15% of 90 is just 90x0.15 which is 13.50. So the fee (13.50) plus the cost(90) is 103.50$ total for the raft
Density is calculated by mass divided by volume. This would be 60/24 (60 grams mass divided by 24 cm^3 volume) 60/24 = 2.5 This means the answer is B. 2.5 g/cm^3
