Which stages require solar radiation ? Thank you

So what you would do is go through and add 3 teaspoons(tsp) 6 times because of the 6 tablespoons(tbsp). which will give you an answer of 18. another way is to multiply 3x6=18.

16- counting by fours

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more