I really need help! I feel like I know this but I can’t figure it out!

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table