In the formula F = mg; m stands for

Is 343 in the sequence -5, -2, 1, 4, 7

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ

If c + di is a point on the circle, then | c + di |=