An X-Ray Exposure of 100 MR Is Recorded at a Distance

question 22

Short Answer

An x-ray exposure of 100 mR is recorded at a distance of 40 inches.To reduce the exposure to 25 mR, to what will the distance need to be changed?

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Definitions:

Duration Rule

A principle that estimates the sensitivity of a bond's price to changes in interest rates, calculated as the weighted average time until a bond's cash flows are received.

Yield

The income return on an investment, such as the interest or dividends received, expressed annually as a percentage of the investment's cost.

Duration

A measure of the sensitivity of a bond's or fixed income portfolio's price to changes in interest rates, typically expressed in years.

Basis Points

A unit of measure used in finance to describe the percentage change in the value or rate of a financial instrument, equal to 1/100th of 1%.