Plea answer meelena plans to ride her bicycle 5 miles to a park and then ride several times around a loop in the park that is 3 miles long. then she’ll ride the same way home. she wants to ride a total of at least 22 miles. the inequality 3t + 10 ≥ 22 models this situation, where t is the number of times elena rides around the loop. solve the inequality. how many times does elena need to ride around the loop? a. 5 or more times b. at most 4 times c. at most 5 times d. 4 or more times

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.