Which situation results in a final value of zero? A the overall change in temperature when the temperature goes from –10°F to 10°F
B the total profit made when a person buys an item for $2.25 and then sells the item for $2.25
the overall change in altitude of a hot air balloon after rising 21 kilometers from sea level
D the total distance a person travels when he bikes 3.1 miles to school and then bikes 3.1 miles back home

water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. at this point, equilibrium is reached. in an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

hope this < 3

the area of a triangle is determined by the formula: base x height * 1/2

you'll need to assign a base to the triangle. based on the vertices given, the simplest base would be the line segment from (-2,1) to (2,1). the distance between any two numbers is found by just subtracting them. here, you should subtract the x values to find the distance of this side.

2 - (-2) = 4.

so the distance (aka the length of the base) is 4. the height of the triangle is the distance between the base and the highest point on the triangle which is (3,4). we should subtract the y values this time to find the height/distance.

4 - 1 = 3

so the height is 3.

base = 4

height = 3

hope this if needed hmu