.has anybody done the 5.05 out vocabulary test in math for k12

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Suppose a batch of steel rods produced at a steel plant have a mean length of 150 millimeters, and a standard deviation of 12. if 100 rods are sampled at random from the batch, what is the probability that the mean length of the sample rods would differ from the population mean by less than 0.5 millimeters?

All the members of a construction crew work at the same pace. six of them working together are able to pour foundation in 22 hours. how many hours would this job take if the number of workers increased by factor of 2?