Omar wrote 3+(4×6 to represent the phrase 3 more than the product of 4 and 6.did omar need to use a grouping symbol? explain.

Can someone me i’m confused. will give brainliest and a whole bunch of points

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms