Given below is the frequency distribution table regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days.
`{:("Concentration", 0.00-0.04, 0.04-0.08, 0.08-0.12, 0.12-0.16, 0.16-0.20, 0.20-0.24), ("No. of days":, 4, 8, 9, 2, 4, 3):}`
Find the probability of concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.

A study was conduced to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follow: {:("0.03 0.08 0.08 0.09 0.04 0.17"),("0.16 0.05 0.02 0.06 0.18 0.20"),("0.11 0.08 0.12 0.13 0.22 0.07"),("0.08 0.01 0.10 0.06 0.09 0.18"),("0.11 0.07 0.05 0.07 0.01 0.04"):} You were asked to prepare a frequency distribution table, regarding the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12-0.16 on any of these days.

To find out the concentrations of S O_2 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below: Concentration of S O_2 (in ppm) Frequency 0.00 - 0.04 4 0.04 - 0.08 9 0.08 - 0.12 9 0.12 - 0.16 2 0.16 - 0.20 4 0.20 - 0.24 2 Find the mean concentration of S O_2 in the air.

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is a follows : (i) Make a grouped frequency distribution table for this data with class-intervals as 0.00-0.04, 0.04-0.08 and so on. (ii) For how many day's was the concentration of sulphar dioxide more than 0.11 parts per million (ppm)?

In a first order reaction, the concentration of the reactant decreases form 0.8 M to 0.4 M in 15 min . The time taken for the concentration to change form 0.1 M to 0.025 M is

Find the equation of the circle through the points (0,0), (2,0) and (0,4). Also find the coordinates of its centre and its radius.

A study was conducted to find out the concentration of sulphur dioxide in the air in parts per million (ppm) of a certain city. The data obtained for 30 days is as follows: 0.03 0.08 0.08 0.09 0.04 0.170.16 0.05 0.02 0.06 0.18 0.200.11 0.08 0.12 0.13 0.22 0.070.08 0.01 0.10 0.06 0.09 0.180.11 0.07 0.05 0.07 0.01 0.04 (i) Make a grouped frequency distribution table for this data with class intervals as 0.00 - 0.04, 0.04 - 0.08, and so on.(ii) For how many days, was the concentration of sulphur dioxide more than 0.11 parts per million?

A second order reaction requires 70 min to change the concentration of reactants form 0.08 M to 0.01 M . How much time will require to become 0.04 M ?

The half-life period of a first order reaction is 20 minutes. The time required for the concentration of the reactant to change from 0.16 M to 0.02 M is :

Find the equation of a parabola whose vertex is (-2,0) and focus is (0,0).

The density of Carbon dioxide at 2.0 atm pressure and 27^0C is :