What is the mistake and why ? how would u correct it

Mistake: There should be no apostrophe to in "Friday's" as it is incorrect to use an apostrophe to represent the plural of Friday.

Fix: The Coast Snack Shack will be Closed on Fridays!

if it's closed the mistake would be that it was be closed so open it. This is pretty self-explanatory

Explanation:

I how was obviously open it that is the solution if it is closed but I don't really know what to tell you

hope this helps but this doesn't make much sense

the students want to see the great sphinx of giza, which is very popular with tourists.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: