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Can someone please please help me. Really important
1. Find the time required for an investment of $5000 to double at an annual rate 7.5% compounded quarterly. Round your answer to the whole year.
2. The half-life of radium-226 is 1600 years.
a) What is the exponential decay rate? Round to 5 decimal place.
b) Suppose we have 22mg sample. How much of the sample will remain after 4000 years. Round to two decimal places
Please explain step by step. Thanks
