What header file must you include in a program using the character conversion functions toupper and tolower

Ithink it would be c (a word object) not 100% sure though

Answer (b) the meter will display a negative sign;

You have several options when you want to enter data manually in excel. you can enter data in one cell, in several cells at the same time, or on more than one worksheet at the same time. the data that you enter can be numbers, text, dates, or times. you can format the data in a variety of ways. and, there are several settings that you can adjust to make data entry easier for you.