exam Maths Puzzle Numerical Ability

Three new ink cartridges cost $9 less than 5 new cartridges. Write and solve for the cost of each cartridge

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exam Other Question

can someone check these for me thanks...
Problem #
Find the effective rate correspondin to the given nominal 18% compounded quarterly.

My answer: 19.2%

Problem #2
Find the
an elevator at a construction site has a maximum capacity of 2500 pounds. if the elevator operator weights 160 pounds and each cement bag weighs 60 pounds, how many bags of cement can be safely lifted on the elevator in one trip?