407 zebra mussels ride into Lake Michigan on the bottom of a ship. They find lots of food and no predators, so their population grows. A year later, there are 917 more zebra mussels in the lake. How many zebra mussels are there now?

3 answers

There are now a total of 924 zebra mussels in Lake Michigan.
NO DO PEMDAS'S ADD
My apologies for the error. Given that 407 zebra mussels rode into Lake Michigan on a ship and then an additional 917 zebra mussels were added, the total number of zebra mussels in the lake would be:

407 + 917 = 1324

Therefore, there would now be 1324 zebra mussels in Lake Michigan.