"make haste slowly" summarizes the attributes of a rescuer when applying first aid. true or false

This is true. That is because when providing first aid you need to be fast but also slow in the sense that you're supposed to be calm and level headed. If you're providing first aid and you're panicking you can make the situation worse and even cause deaths of people in worst case scenarios. That's why it is said that you need to make haste slowly.

What subject do you need with?

False would be the correct answer