Silvia rode her bicycle 40 km in the same time Tracy rode 28 km. Tracy's rate was 3 km/h slower than Silvia's. How fast did each woman ride?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

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

How does percent markup and percent discount relate to percent of change?