DONT JUST GUESS PLEASE I NEED THE ACTUAL ANSWER PLEASE I WILL GIVE BRAINLIEST

(02.07)Which relationship is always true for the angles r, x, y, and z of triangle ABC?
A-x + Z=Y
B-180 degrees - x=r
C-X+ y + z = 180 degrees
D-x+ y + z = 90 degrees

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