When Ricki walks to school on the sidewalk, she walks 7/10 mile.
She then takes a shortcut across the field, which is 1/4 mile long.
How long is Ricki route to school?
PLS HELP HURRY I KNOW ITS LATE

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)