A bag contains four black marbles and three white marbles. If one marble is drawn out, and not replaced before another is drawn out, draw a tree diagram to find the probability that the two
marbles taken out are different colours.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Drag the tiles to the correct boxes to complete the pairs. not all tiles will be used. match each division expression with the correct quotient.

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g