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1 year ago

The half-life of a radioactive element is five years. A scientist has 18 grams of the element. The equation

Mathematics

1 answer:

lianna [129]1 year ago

7 0

Answer:

The equation that describes the amount of mass left after a time t of a radioactive isotope is the following:

where

is the mass of the sample at t = 0

is the half-life of the sample

For the element X in this problem,

We want to find the time t at which

So we need to re-arrange the equation making t the subject:

Step-by-step explanation:

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Answer:

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5. Which of the following sets of fractions is arranged in order from LEAST to GREATEST?

SCORPION-xisa [38]

Answer:

$\{\frac{1}{8},\frac{1}{4},\frac{1}{2}\}$

Step-by-step explanation:

Required

Which is ordered in ascending order

To do this, it is best to convert the fractions to decimal and then make comparison.

From the options, only (b) is ordered in ascending order and the proof is as follows.

$\{\frac{1}{8},\frac{1}{4},\frac{1}{2}\}$

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$\{0.125, 0.25, 0.5\}$

By comparison:

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2 years ago

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