Lan used the Pythagorean Theorem to find the distance between two points as follows. a² + b² = c²
(11 - 2)2 + (3 – 15)2 = (?
g²+ (-12)² = c²
81 +144 = c2
225 = c2
C= 15
Which of these pairs of points could he have been finding the distance between?
O (2, 15) and (11,3)
O (11, -2) and (3, -15)
O (-2, -15) and (11,3)
o (11, 2) and (3, 15)

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec