Question

question 7 (2.5 points)
the metric system is based on the decimal system, which is based on units of ------.
○ 1
○ 10
○ 100
○ 1000
question 8 (2.5 points)
how many micrograms are in one milligram?
○ 10
○ 100
○ 1000

Explanation:

Question 7

The metric system (decimal system) uses units that are powers of 10. The base unit multiplier for the decimal system is 10, as prefixes like kilo- (1000), centi- (1/100), milli- (1/1000) are based on factors of 10. So the decimal system is based on units of 10.

Step1: Recall metric prefixes

Micro- ($\mu$) is $10^{-6}$ and milli- (m) is $10^{-3}$.

Step2: Calculate the conversion

To find how many micrograms ($\mu$g) are in 1 milligram (mg), we use the relationship: $1\space mg = 10^{-3}\space g$ and $1\space \mu g = 10^{-6}\space g$. So, $\frac{10^{-3}\space g}{10^{-6}\space g/\mu g}= 10^{3}=1000$.

Answer:

B. 10 (assuming the options are labeled A:1, B:10, C:100, D:1000)

Question 8