Final answer:
To observe a paramecium with a 40x objective lens and a 10x ocular lens on a compound light microscope, the total magnification will be 400x.
Step-by-step explanation:
When using a compound light microscope, the total magnification achieved by the system can be calculated by multiplying the magnification of the objective lens by that of the ocular lens, often 10x. In the case of observing a paramecium with a 40x objective lens and a standard 10x ocular lens, the magnification at which the student will see the paramecium is:
(40x objective lens) × (10x ocular lens) = 400x total magnification
Therefore, the student will view the paramecium under a magnification of 400 times.