there are 25 girls. you can figure this out by adding 5 and 8 to find that there are 5 girls for every 13 students. then you have to find how many times 13 fits into 65. in this case it is 5. knowing this you can multiply the 5 girls by 5 to find that there are 25 girls in a class of 65 students
The descent of the balloon would take 14 minutes To find the answer to this problem, take the elevation change (315) and then divide it by the rate of descent (22.5)
