2) 20 women build a wall in 6 days. a) How long would it take 10 women to build the same wall? a) How long would it take 30 women to build the same wall? b) It takes x women 2 days to build the same wall. Work out the value of x

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Can someone me out here number 4 plz

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?