Cigarette Smoke Analysis Using An Inexpensive Gas-phase Ir Cell Can Someone Help Me With These Dimensional Analysis Problems?

Can someone help me with these dimensional Analysis problems? - cigarette smoke analysis using an inexpensive gas-phase ir cell

These are challenges that need help. These are problems of the text.

1. If cigarettes Gasp 5 mg tar and 0.4 mg of nicotine per cigarette, and there are 20 cigarettes per pack, how many packs of cigarettes. had the habit of smoking in the lung of the tour with 4 ounces (1 / 4 lb.) of tar? How many packages you have to give the smoke of their lungs for a gram of the drug nicotine?

2. Overlapping part, and the driver was drunk. The vehicle is 60 miles per hour. Suddenly, close to the children on the street. Because the driver was drunk, his reaction was to be delayed by 1 sec. How many meters in the accident, the upcoming road trip before starting the driver to stop?

3. Some owls keep areas of 3 hectares. How many owls can live in a wooded area of 20 hectares?

(1 hectare. Dekameter = 1 m = 100m ² = 2,47 acres)

Please help me solve these problems.