What is the approximate circumference of a circle with a diameter of 500 kilometers ? use pi= 3.14.

a ( 785 kilometers
b ( 1570 kilometers
c ( 3140 kilometers
d ( 3725 kilometers

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

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?

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle