Boys Girls
Total
Beginner
0.15
0.1
0.25
Intermediate
0.2
0.35
0.55
Advanced
0.05
0.15
0.2
Total
0.4
0.6
1.0
Which statement is true?
O A. 60% of her students are girls.
O B. 10% of her students are in the beginner class.
OC. 15% of her students are boys.
OD. 35% of her students are in the intermediate class.

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.