Joffrey is signing up for a new Internet service plan that initially costs $49.99 a month. After a 3-month trial period, the company increases the price by 25%. Additionally, the company charges a flat-fee of $10 a month for service charges. If Joffrey is going to need Internet access for the next m months, where m > 3, how much will he be charged, in dollars?

49.99(1.25m) + 10m
49.99(3) + 49.99(1.25)(m − 3) + 10m
49.99(1.25)(3) + 49.99(m − 3) + 10m
49.99(1.25)(10m)

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