Calculating Magnification of a Microscope: Solving the Magnification Problem

[CuteWolf]

A microscope produces an image that is 1.00 x 10^-4 m high from an object that is 4.00 x 10^-7m high. What is the magnification of the microscope?



I've already tried applying this with the formula 1f = 1÷d_o + 1÷d_i

So: 1f = ( 1÷ 4.00 x 10^-7) + ( 1÷ 1.00 x 10^-4 )
1f = 250 000 + 1000
1f ÷ 1 = 251 000 ÷ 1
f = 251 000

Already, this doesn't seem to be the right answer in my opinion.. but I'm not sure. Now, I'm trying to use the formula M = h_i ÷ h_o = -d_i ÷ d_o

Can anyone help sort of.. guide me in the right direction on how I'm supposed to solve this now? (= ~Thanks

 

[CuteWolf]

Three hours of no replies.. I'm sorry for being impatient but I have around 20 of these questions to solve for tomorrow.. so yeah ._. Help please?