Final answer:
To round 15,219.88 to the nearest tenth, increase the tenths place by one since the hundredths place is 8, resulting in 15,219.9.
Step-by-step explanation:
The student has asked to round the depth of a crater caused by a meteor impact to the nearest tenth. To round the number 15,219.88 to the nearest tenth, you look at the hundredths place to decide whether to round up or stay the same. Since the hundredths place is 8 (which is 5 or above), you would round up. Therefore, the crater depth rounded to the nearest tenth is 15,219.9.