Rama's weight is 40 kg She is carrying a load of 20kg up to a height of 20 meters. What work does she do also mention the type of work do process also​

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

At a pizza shop 70% of the customers order a pizza 25% of the customers order a salad and 15% of the customers order both a pizza and a salad if s customer is chosen at random what is the probability that he or she orders either a pizza or a salad

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.