7(a+4)? can someone help me understand because its too late to ask my teacher and my mom does not understand math like this which is why she did not go to college but whatever now pls help thanks

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next