exam Maths Puzzle Numerical Ability

Simplify:
log(base 2)8 + 3 log(base 3)3 - log(base 2)1 + log(base 4)(1/4)

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exam Other Question

Can you please help me solve the problem...instructions...a principal of $5000 was invested in a savings account for 4 years...if the interest earned for the period was $400, what was the interest rate? The formula for calculating the amount of money returned for an initial deposit money into a bank account or CD (Certificate of Deposit) is given by

A is the amount of returned