A Sample of a Radioisotope Shows an Activity of 999

question 105

Multiple Choice

A sample of a radioisotope shows an activity of 999 disintegrations per minute due to beta decay.If after 1.10 years the activity is 952 disintegrations per minute, what is the half-life of this radioisotope?

• A)4.38 × 10^-2 yr
• B)11.4 yr
• C)0.25 yr
• D)15.8 yr
• E)9.1 yr

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Definitions:

Profit Margin

A financial metric that measures the amount of net income earned with each dollar of sales.

Selling Price

The amount of money a buyer pays to purchase a product or service.

Target Cost

The maximum amount that can be spent on developing a product or service, while still earning the desired profit margin.

Selling Price

Selling Price is the amount of money a buyer pays to purchase a product or service, which could include considerations for costs, profit margins, and market demand.