Answer :
Let's solve this question by converting all the given values to the same unit, millivolts (mV), and then adding them up step by step.
1. Start with the values we have:
- 35 millivolts (mV)
- 0.8 millivolts (mV)
- 1200 microvolts (µV)
- 900000 nanovolts (nV)
2. Convert microvolts (µV) to millivolts (mV):
- Since 1 millivolt is 1000 microvolts, divide the microvolt value by 1000:
[tex]\[
1200 \, \text{µV} = \frac{1200}{1000} = 1.2 \, \text{mV}
\][/tex]
3. Convert nanovolts (nV) to millivolts (mV):
- Since 1 millivolt is 1,000,000 nanovolts, divide the nanovolt value by 1,000,000:
[tex]\[
900000 \, \text{nV} = \frac{900000}{1000000} = 0.9 \, \text{mV}
\][/tex]
4. Now, add all the values in millivolts together:
[tex]\[
35 \, \text{mV} + 0.8 \, \text{mV} + 1.2 \, \text{mV} + 0.9 \, \text{mV} = 37.9 \, \text{mV}
\][/tex]
Therefore, the total sum is 37.9 mV, which means the correct answer is:
37.9 mV
1. Start with the values we have:
- 35 millivolts (mV)
- 0.8 millivolts (mV)
- 1200 microvolts (µV)
- 900000 nanovolts (nV)
2. Convert microvolts (µV) to millivolts (mV):
- Since 1 millivolt is 1000 microvolts, divide the microvolt value by 1000:
[tex]\[
1200 \, \text{µV} = \frac{1200}{1000} = 1.2 \, \text{mV}
\][/tex]
3. Convert nanovolts (nV) to millivolts (mV):
- Since 1 millivolt is 1,000,000 nanovolts, divide the nanovolt value by 1,000,000:
[tex]\[
900000 \, \text{nV} = \frac{900000}{1000000} = 0.9 \, \text{mV}
\][/tex]
4. Now, add all the values in millivolts together:
[tex]\[
35 \, \text{mV} + 0.8 \, \text{mV} + 1.2 \, \text{mV} + 0.9 \, \text{mV} = 37.9 \, \text{mV}
\][/tex]
Therefore, the total sum is 37.9 mV, which means the correct answer is:
37.9 mV
