Final answer:
To round 379.94 to the nearest tenth, the hundredths place is considered. Since it is 4, which is less than 5, the number remains 379.9.
Step-by-step explanation:
To round 379.94 to the nearest tenth, we look at the digit in the hundredths place, which is 4 in this case. Since 4 is less than 5, we do not increase the number in the tenths place. Therefore, 379.94 rounded to the nearest tenth is 379.9, which matches option c).