exam Maths Puzzle Numerical Ability

Checking my math: Can someone shows the steps and solution? Thanks

Simplify using the power rule.

5y^3(y^5)^2
____________
10y^5(y^2)^6

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exam Other Question
x+8=12 Please help!

Use the ln key to express each number as a power. Then use the rules of logarithms to find the answer.

(45,332 * 10^5)(33,654 * 10^-4)

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93,153