exam Maths Puzzle Numerical Ability

3^x=40

e^0.04t=1500

please help me solve these... if possible...i need good step by step process

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exam Other Question

Craig purchases a book and an audiocassate of another book. The total cost is $36.00. The book costs $9.00 more than the audiocassette. How much does each item cost? Perform the indicated operations; write answer in simplest form; note: "•" denotes multiplication:
4 and 2/3 • 3 and 1/3 • 3 and 3/4