Ten tiles numbered 1 through 10 are placed in a bag. you randomly choose one tile. without replacing the first tile, you randomly choose a second tile. find the probability of choosing the 4 and then an even number. write your answer as a fraction in simplest form. plz me i don't understand this!

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?