500 g of a radioactive element is decaying exponentially. After 5 days 298 g of the element is left. a. Write a function in the form y = yo ekt giving the number of grams of the element after t days. 298) f(t) 500 b. Write the function from part a in the form y = yo c. Use the answer from part a to find the half-life of the element. a. The exponential equation in the form y = yo e kt is (Round to three decimal places as needed.) b. The function from part a in the form y = yo (Round to three decimal places as needed.) c. The half-life of the element is days. (Round to one decimal place as needed.) 298 500 f(t) is