At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
b. The Daily Value (DV) for selenium is 70. mcg.

Question

At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:

b. The Daily Value (DV) for selenium is 70. mcg.

Accepted Answer

Hello. On this program, we are asked to write the equality and conversion factors for the updated daily value for Biotin is 30 micrograms. We are asked to identify the numbers as exact or measured. And if measured to give the number of significant figures, we are given four possible answers. All four answers provide us with inequality of one day is equal to 30 micrograms. And all four answers provide us with two possible conversion factors of 30 micrograms bio per one day and one day per 30 micrograms. Bio 10, what differs then is whether they're measured or exact in the number of significant figures. Answer A states that 30 micrograms is measured and has two significant figures. One day is measured and has one significant figure answer. B states that 30 micrograms is measured and has one significant figure. One day is measured and has no significant figures. Answer C states that 30 micrograms is measured and has two significant figures and one day is exact and answer D states that 30 micrograms is measured and has one significant figure and one day is exact. All four possible answers provide us with the correct equality. One day is equal to 30 micrograms. And the two possible conversion factors have micrograms of bio divided by one day and one day, the bad 30 micrograms. The what differs is whether these values are considered exact or measured. We call that an exact number is not measured. It is a count or defined relationship. It is got infinite precision. And as the name indicates, we know it exactly. So if we count, for example, the number of fingers on our hand, we know we have exactly five fingers, an inexact number. The major number it is measured using a majoring tool. And there is some uncertainty associated with the majoring tool. An example would be making use of a balance, find the mass. So in our problem, we have 30 micrograms a bio. So this is measured, we have a decimal behind the zero which indicates then that the three and the zero are both significant. So this has two significant figures. The one day is considered exact. So it's used to set up the definition of the mountain bio per day, going back to the answers we've been provided answer A states that micrograms is measured and has two significant figures. That's correct. And then states that one day is measured and has one significant figure. So that's incorrect. So A is incorrect answer. B states that 30 micrograms is measured and has one significant figure and one day is measured and has no significant figures those are both incorrect answer. C states that one day or sorry, 30 micrograms is measured and has two significant figures. That's correct and one day is exact, that's correct. So answer C is the correct answer. Answer. D states that 30 micrograms is measured and has one significant figure. And one day is exact 30 micrograms is measured but it has two significant figures. So answer D is also incorrect. The correct answer is answer C 30 micrograms is measured and has two significant figures and one day is exact. Thanks for watching. Hope this helped.

At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
b. The Daily Value (DV) for selenium is 70. mcg.

Verified video answer for a similar problem:

Key Concepts

Daily Value (DV)

Significant Figures

Conversion Factors

At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:b. The Daily Value (DV) for selenium is 70. mcg.

Verified video answer for a similar problem:

Key Concepts

Daily Value (DV)

Significant Figures

Conversion Factors

At Sandra's clinic, the medications in a. to d. are used. Write the equality and two conversion factors, and identify the numbers as exact or give the number of significant figures for each:
b. The Daily Value (DV) for selenium is 70. mcg.