exam Maths Puzzle Numerical Ability

For a sample of size n-100, proportion p-0.6, and at a 95% confidence level, What is the upper bound of the proportion?

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exam Other Question

Find the exact value of x if 7^x=3^5 I think the answer is 5log3/log7??? it says to rewrite the expressions with positive exponents

heres the problem

51) x to the -5 power