What temperature is 10 degrees less than 4 degrees celsius ?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool.how far is the ball from the opposite edge of the pool