a boy went to market to purchase a shirt. the shop had 4 red colored shirts, three black colored shirts and 5 green colored shirts. if the probability of a boy picking a shirt was 1/3 which colour shirt was purchased by the boy

Chip worked at the animal shelter for 6 hours each week for several weeks. he worked for a total of 42 hours. which of the following can be used to find the number of weeks chip worked at the animal shelter?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

2.5 milligrams is equivalent to how many grams