Hi I need help on what is the answer to this problems? Below is the question and other concerns will be in the comment section. I hope you can help me and surely I will give you full positive feedback

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ACTIVITY 1: Using the Fundamental Theorem of Calculus (FTC), compute the following: 1. S2 (x3 + 5) dx 2. So (x2 + 1) dxSolve the following situational problems: 1. The state of decay of radium is proportional to the amount present at any time. Suppose that 400 mg of radium are currently present, and the amount decreases after every hour. After 1 hour, it decreases to 295. How much radium will be left after 2.5 hours if the decrease in number is constant? 2. Bacteria grown in a certain culture increase at a rate proportional to the amount present. If there are 1500 bacteria present initially and the population tripled in 2 hours, how many bacteria will there be after 3 hours