The rate at which a certain drug is eliminated by the body follows first-order kinetics, with a half life of 83 minutes. Suppose in a particular patient the concentration of this drug in the bloodstream immediately after injection is 1.4 μg/mL What will the concentration be 332 minutes later?
Round your answer to 2 significant digits and put the answer in terms of μg/mL.

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Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?