Consider a tank filled initially with 10L of water. Saline (2% w/v NaCl)is added at a rate of 2L/hr, where it is mixed thoroughly by an ideal mixture. At the same time, the contents of the tank are allowed to drain out, also at the rate of 2L/hr. How long does it take for the concentration of salt in the outflow stream to reach a value of 0.25% (w/v)?

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

Part a what is the area of triangle i? show your calculation. part b triangles i and ii are congruent (of the same size and shape). what is the total area of triangles i and ii? show your calculation. part c what is the area of rectangle i? show your calculation. part d what is the area of rectangle ii? show your calculation. part e rectangles i and iii have the same size and shape. what is the total area of rectangles i and iii? show your calculation. part f what is the total area of all the rectangles? show your calculation. part g what areas do you need to know to find the surface area of the prism? part h what is the surface area of the prism? show your calculation. part i read this statement: “if you multiply the area of one rectangle in the figure by 3, you’ll get the total area of the rectangles.” is this statement true or false? why? part j read this statement: “if you multiply the area of one triangle in the figure by 2, you’ll get the total area of the triangles.” is this statement true or false? why?

An amusement park issued a coupon to increase the number of visitors to the park each week. the function below represents the number of visitors at the amusement park x weeks after the issuance of the coupon.