exam Maths Puzzle Numerical Ability

Find the degree of the measure of the central angle associated with an arc that is 16 inches long in a circle with a radius of 12 inches.

A. 76.4(degrees)
B. 270.0(degrees)
C. 283.6(degrees)
D. 43.0(degrees)

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exam Other Question

Solve.
6(r-7)+1 > 7(r+3)-22
The solution set is {rlr ? ?}

Will some one help me please...
(3x^3y^5m^2)(x^2y)^-2
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x^2y^0y^-4

This problem needs to be simplified, so far I have (9x^4y^10m^4)(x^-4y^2)
Am I anywhere close to the correct answer?