exam Maths Puzzle Numerical Ability

Solving for :

3square root of z-2 =4

Is the first step raising to the power of 3?

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exam Other Question

In 1990, the United States imported 917 million dollars worth of wine. In 2000, the United States imported 2209 million dollars worth of wine.

(Source: U.S. Department of Agric Maxine invested $4000 in two accounts, one earning interest at 4% per year and the other at 2%. If his total interest for one year is $140, find how much she invested at 4%.