3 years ago

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Mathematics

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liraira [26]3 years ago

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Airida [17]3 years ago

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How much of a radioactive kind of calcium will be left after 10 days if the half-life is 5 days

Sophie [7]

Answer: 16 g

Step-by-step explanation:

We can solve this with the Radioactive Half Life Formula:

$A=A_{o}.2^{\frac{-t}{h}}$

Where:

$A$ is the final amount of radioactive calcium

$A_{o}=64 g$ is the initial amount of radioactive calcium

$t=10 days$ is the time elapsed

$h=5 days$ is the half life of radioactive calcium

Solving with the given data:

$A=(64 g)2^{\frac{-10 days}{5 days}}$

$A=16 g$ This is the amount of radioactive calcium left

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4 years ago

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3 years ago

Points V, W, X, Y, and Z are graphed on a number line. The coordinate of point V is 3. What points are at a distance of 7 units

Aloiza [94]

Because we are only referring to a number line, it is known that the distance between points are the absolute values of the differences between the numbers. From the given choices, B. X = -4 as the distance between 3 and -4 is equal to 7. Similarly, the distance between Z = 10 from V is also 7. The answers are B and D.

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4 years ago

Write an expression equivalent to e+e+e+e+e that is a sum of two terms.

slamgirl [31]

Answer:

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Step-by-step explanation:

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3 years ago

A kite is inscribed in a square with a side length of 9 units.

NISA [10]

Answer:

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Step-by-step explanation:

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4 years ago

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