An archaeological excavation at burnt mesa pueblo showed that about 10% of the flaked stone objects were finished arrow points†. how many flaked stone objects need to be found to be 90% sure that at least one is a finished arrow point? (hint: use a calculator and note that p(r ≥ 1) ≥ 0.90 is equivalent to 1 − p(0) ≥ 0.90, or p(0) ≤ 0.10.) objects

14 pointslet x be the seats in the small van and y the seats in the large van. how many seats does the large van have? a company uses two vans to transport worker from a free parking lot to the workplace between 7: 00 and 9: 00a. m. one van has 9 more seats than the other. the smaller van makes two trips every morning while the larger one makes only one trip. the two vans can transport 69 people, maximum. how many seats does the larger van have?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Hi, can anyone show me how to do this problem? 100 points for this. in advance