please help...The floor of a classroom consists of 700 tiles which are shaped like a parrallelogram. The base of the parallelogram is 24cm and the altitude to the base(height) is 10cm and the rate of polishing the floor is Rs 70 per metre square. Find the total cost of polishing the floor​

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0