exam Maths Puzzle Numerical Ability

Kevin earned $165 interest for 1 year on an investment of $1500. At same rate, what amount of interst would be earned by investment of $2500? Here is what I came up with. Please help me. Thank you in advance.
$2500 x 12= $300 interest

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exam Other Question

The question in my homework is:
Write the answer using positive exponents only
[2x5y^-4/3y^-2]^2

I know I need to flip to make them positive but have been wracking my brain trying to figure out where to go from there
log(3)9
Evaluate: