- What is the half-life of a radioactive isotope if a 500.0g sample decays to 62.5g in 24.3 hours?

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What is 98 divided by 51450 in long division? Construct a Sample w/ two diff values of 3 measurements whose variance is negative? Given parallelogram MNOP, if PN=27, what is NQ? Find all solutions in the interval [0, 2π). (sin x)(cos x) = 0? Will the results of an in vitro antibiotic sensitivity test always agree with the results of in vivo use of the antibiotic ? Why or why not?