exam Maths Puzzle Numerical Ability

How many years will it take $6,000 invested at 8% interest to earn $1,680?

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exam Other Question

A bookstore manager plans to spend $60 on pens at 30 cents each and penciles at 10 cents each. The equation 0.10x+0.30y=60 can be used to model this situation.

a) what do x and
Hello,
can anyone help me factor these polynomals completely.
Much appreciated.

Todd

125 - 8x cubed ?

54t cubed + 16v cubed. I believe this one must ne prime