exam Maths Puzzle Numerical Ability Number System

Can someone correct these for me when theres a little chance thanks...

Problem #1
Find the simple interest. Assume a 360-day year. Round result.

$17000 at 9% for 119days

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exam Other Question

Find the difference of the polynomials below. Use the caret ( ^ ) to enter any exponents; for example, write x2 as x^2. Write your answer in descending order(x3 + 2x2 + 4x + 7) - (2x3 - 1.5x2 + 4x + 4) WOW this is a tough one! Can someone please help!
If:
z = 6(cos 205 degrees + i sin 205 degrees) and w = 3(cos 85 degrees + i sin 85 degrees), find z/w in polar form.
Thanks aga