Does anyone know what happened to the tutor option?

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

Eric has challenged himself to walk 24,000 steps in 4 days. if eric walks the same number of steps each day, which function represents the number of steps eric still needs to walk to reach his goal with respect to the number of days since he started his challenge? a. y = 8,000x − 24,000 b. y = -8,000x + 24,000 c. y = 6,000x − 24,000 d. y = -6,000x + 24,000

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?