Question

The average human body cell is about 5.1 \cdot 10^{-4} \text{ cm}5.1⋅10 −4 cm5, point, 1, dot, 10, start superscript, minus, 4, end superscript, start text, space, c, m, end text in diameter. The diameter of a plant cell is 8 \cdot 10^{-3} \text { cm}8⋅10 −3 cm8, dot, 10, start superscript, minus, 3, end superscript, start text, space, c, m, end text. What is the combined diameter of the body cell and plant cell?

Answer 1

Answer:

5.1⋅10  −4 +8.0⋅10  −3

5.1⋅10  

−4 =(5.1⋅10  −1  )⋅10  −3

0.51⋅10  −3  +8.0⋅10  −3

(0.51+8.0)⋅10  −3

=8.51⋅10 −3 (little number)  cm