Chapter SH, Problem 12.9APP

To determine

To calculate: Number of cone cells distributed over an area of $2{\text{ cm}}^2$ in scientific notation.

Answer to Problem 12.9APP

Number of cone cells distributed over an area of $2{\text{ cm}}^2$ is $\underset{\_}{2.8\times {10}^6}$ .

Explanation of Solution

Given:

Number of cone cells distributed over an area of ${\text{5 cm}}^2$ = $7,000,000$

Calculation:

Number of cone cells distributed over an area of ${\text{5 cm}}^2$ = $7,000,000$

Number of cone cells distributed over an area of ${\text{1 cm}}^2$ = $\frac{7,000,000}{5}=1400000$

Number of cone cells distributed over an area of ${\text{2 cm}}^2$ = $1400000\times 2=2800000=2.8\times {10}^6$

Conclusion:

Number of cone cells distributed over an area of $2{\text{ cm}}^2$ is $\underset{\_}{2.8\times {10}^6}$ .