More math puzzels!! Help!!?

Question

David and his family are preparing to have a crawfish boil on the shores of Lake Livingston. David's dad needs water for the pot . He hands David two jugs and says "The big jug holds 5 gallons and the small jug holds 3, go down to the lake and bring me exactly 4 gallons back all in the five gallon jug" Describe how this is possible.

#2
A car tire has an area of 200.96 square inches (this is the sectional area, meaning the area of the circle.) How far does the car travel after the tire makes seven complete rotations?

Answer 1

#1

Fill the 5 gallon jug. Pour 3 gallons of those 5 gallons to the 3 gallon jug. Empty the 3 gallon jug. Now the 5 gallon jug has 2 gallons left. Pour those 2 gallons into the empty 3 gallon jug. Now there is 1 gallon of empty space in the 3 gallon jug. Pour the 5 gallon jug with 5 gallons. Pour one of those gallons into the 3 gallon jug which only has space left for 1 gallon.

#2

One rotation is the equivalent of the length of 1 diameter covered in distance. So if A=200.96 sq in=PIE radius squared

You do some calculations and r=8 inches so 2r=D=16 inches

17 times 16 inches=272 inches

Answer 2

Fill up the 3, pour it in the 5.
Fill up the three top off the 5 with the three.
There's one left in the three.
Dump the 5.
Pour the one that's in the three into the five.
Fill up the 3, pour it in the 5.
There's your 4.

A = (pi)r^2
r = √(A/(pi)) = √(200.98/(pi)) = 7.99837in
C = (pi)D = 2(pi)r
The car travels 7(2(pi)r) = 14(pi)(7.99837) = 351.7867in = 29.3156ft

Answer 3

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