Sasha finished mowing lawns at 4: 15 pm. it took 1 3/4h to mow the first lawn. the second and third lawns she mowed each took 1 1/5 h. she took one 45-min break. when did sasha begin mowing the first lawn? a. 10.05 a. m. b. 11: 05 a. m. c. 11: 21 a. m. d. 12: 21 p. m.

7. the area of the playing surface at the olympic stadium in beijing isof a hectare. what area will it occupy on a plan drawn to a scaleof 1: 500?

Identify the conclusion of the conditional statement. if you live in phoenix, then you live in arizona.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.