exam Maths Puzzle Numerical Ability

Whats the polynomial of 3x^2+4x+1 ?

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exam Other Question

For the following function, C computes the cost in millions of dollars implementing a city recycling project when x percent of the citizens participate.
C(x) = 1.4x/(100-x)
a.) Can someone help me on this problem?

A student got the following scores on five math tests: 91, 88, 94, 95, 85. I need to determine the range of the scores.

Thanks,
Ashley