What is the equation for the normal force for a body with mass m that is at rest on a horizontal surface? 1.N = m

2.N = mg

3.N = mv

4.N = g

reserve is the answer

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form