figure 4 showes an open-topped water tank, in the shape of a cuboid, which is made of a sheet metal. the base of the tank is a rectangle "x" meters by "y" meter. the hight of the tank is "x" meter the volume of the tank is 100m³ (show that the area Am² of the sheet metal used to make the tank is given by A= 300 OVER "X" +2"X" ²

Three times the sum of a number and seven is negative thirty-six. what is the number?

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables