Nola hiked down a trail at a steady rate for 10 minutes. her change in elevation was -200 feet. then she continured to hike down for another 20 minutes at a different rate. her change in elevation for this part of the hike was -300 feet. durning which portion of the hike did she walk down at a faster rate? explain your reasoning

In δabc, if the length of side b is 3 centimeters and the measures of ∠b and ∠c are 45° and 60°, respectively, what is the length of side c to two decimal places?

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.

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