Question

in lower-income countries, the high cost of medical equipment, such as microscopes, is often an obstacle to providing health care. stanford university professor manu prakash came up with a simple answer: he created foldscope, a microscope made almost completely of paper that costs less than a dollar. other equipment, such as centrifuges, needs electricity to operate. centrifuges spin blood samples to diagnose infections like malaria. to improve health care access in areas without electricity, prakash invented the paperfuge. the paperfuge is a centrifuge made of paper and string. it costs about twenty cents and doesnt require electricity. match the problems with their solutions. centrifuges are expensive and need electricity. microscopes are expensive. problem solution prakash invented a version made mostly of paper. prakash invented a version made of paper and string.

Explanation:

The text states that Foldscope (a microscope made almost completely of paper) was created to address the high - cost of microscopes. And Paperfuge (a centrifuge made of paper and string) was invented to deal with the issues of centrifuges (expensive and need electricity).

Answer:

• Problem: Centrifuges are expensive and need electricity. Solution: Prakash invented a version made of paper and string.
• Problem: Microscopes are expensive. Solution: Prakash invented a version made mostly of paper.