Ross and Rachel agree to meet for a date. Ross drives at 40 kph and Rachel at 35 kph. After how many hours will they meet if they are 150 km apart and they start driving directly toward each other at the same time?
1.) Make a diagram/illustration of the scene. 2.) Make a table of the given.
Let t = number of hours until they meet = time Ross traveled = time Rachel Diagram Ross, 40kph Rachel, 35 kph 150 km We use the formula, distance = rate x time
p. 87 Ex. 29 MIXTURE How much water must be added to 100 L of denatured alcohol 90% pure to dilute into 75% alcohol content? 100 L 90 % X 0% 100 + X 75%
The edge of a cube is doubled. What happens to its volume?
Volume increases 8 times bigger.
GEOMETRY Example (Not in the book) An architect is to design a swimming pool in a hotel, to be fenced off on 3 sides with 60 meters of material. The pool is to have an area of 352 sq.m. What should the dimensions of the pool be? L W