There are 6,657 marbles in a jar. approximately 34% are white, and the rest are black. how many black marbles are there?

So if there are 34% white marbles, that means that 66% are black (100% - 34% = 66%). 

If 100% = 1.00, then 66% = 0.66.

Now, you just need to multiply the total by this decimal in order to find the number of black marbles:

6657 x 0.66 = 4393.62, which can be rounded to 4394

Therefore, there are about 4394 black marbles in the jar. 

I hope this helps!

110 large bags and 170 small bags of popcorn were sold.

Step-by-step explanation:

Since yesterday a movie theater sold 280 bags of popcorn, and a large bag of popcorn costs $ 4 while a small bag of popcorn costs $ 1 and in all, the movie theater made $ 610 from popcorn sales, to find how many bags of each size of popcorn were sold, the following calculation must be performed:

280 x 4 + 0 x 1 = 1120

140 x 4 + 140 x 1 = 700

130 x 4 + 150 x 1 = 670

110 x 4 + 170 x 1 = 610

Therefore, 110 large bags and 170 small bags of popcorn were sold.