Aclass of 40 students elected a class president. there were 12 votes for candidate a, and 18 votes for candidate b. the rest of the class did not vote. which expression gives the percent of voters who voted for candidate a?

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?