An ecologist wishes to mark off a circular sampling region having radius 10 m. however, the radius of the resulting region is actually a random variable r with the following pdf.
f(r) = 3/4
1 − (14 − r)2
0
13 ≤ r ≤ 15
what is the expected area of the resulting circular region?

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?

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55