a teaspoon of common sugar contains 16 calories (16 kcal). what is the mass of one teaspoon if the average number of calories for carbohydrates is 4.1 calories/g?

Solve this problem e=0+4m+p/6 (i also need to know what they are asking)

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

Rick is on a bicycle trip. every 4 days he bikes 230 km. if rick keeps this same pace for 16 days, how many kilometers will he bike?