book Maths Puzzle Numerical Ability

prob. 94 The cost for a long distance phone call is 0.46 for the first minute,and 0.21 for additional minute or portion thereof.Write an inequality representing the number of minutes a person could talk without exceeding 3.00

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book Other Question

Without the use of a calculator, list the numbers 2^1/2, 3^1/3, 5^1/5 in order from largest to smallest. Find the area of the triangle bounded by the lines x=2, y=3 and 8x+5y=40.
please help i really dont know whow to do this.thanks