At an amusement park, the straight water slide is 42 m long and drops 20 m. What angle does the slide make with the horizontal?

There are two red jars of marbles and one blue jar of marbles. jars of a certain color have the same number of marbles in them. there are 38 marbles in total. the difference between the number of marbles in a red jar and the number of marbles in a blue jar is 10. find the number of marbles in each type of jar.