Please help im dead What is the total magnification of a sample with an ocular lens power of 15x and using a 40x objetive lens ?

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.

Ithink b hope that