Question

20. Monroe's teacher wants each student to draw a sketch of the longest specimen. Which specimen is the longest? 21. Seen through the microscope, a specimen is 0.75 cm long. What is its actual length?

Answer 1

20)

The sketch of the given data is

By observing the sketch, the longest line is A.

Hence the specimen A is the longest.

21)

In the microscope, the size of the specimen is 0.75cm long.

It is given that the microscope enlarges the actual length 100 times.

`\text{Size =100}* Actual\text{ length}`

`\frac{\text{Size }}{100}\text{=}Actual\text{ length}`

Substitute Size=0.75, we get

`(0.75)/(100)=\text{Actual length}`
`\text{Actual length=0.0075 cm}`

Hence the actual length of the specimen is 0.0075cm.