Answer:
$1.25
Step-by-step explanation:
Set up a proportion, use inverse operations, and solve;
cups : price
4 : 5
/4 /4
1 : 5/4
1 : 1.25
1 cup to $1.25
5 pounds
80 - 39.85 = 40.15
40.15 ÷ 8.03
= 5
18
8 becaus it dives. 2 meters second so if it dives to meters every second then all you have to do is add to to 4 seconds