The diameter of a white blood cell under magnification appears to be 0.3 centimeters. what is the diameter of the white blood cell in millimeters? (a microscope has a scale of 250: 1)

Diameter of the cell will be 0.012 mm.

Step-by-step explanation:

The diameter of a white blood cell under magnification was 0.3 centimeters.

Since 1 centimeter = 10 mm

Therefore, 0.3 cm = 0.3×10

                              = 3 mm

If a microscope has a scale of 250 : 1

Then diameter will be in the same ratio.

=

=

Original diameter of the cell =

                                               = 0.012 mm

he spend 5.1 minutes chatting with his friends.

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5.1

22 and 22

step-by-step explanation:

10 plus 12 equals 22.

12 plus 10 also equals 22 because regardless of what order they're in, they're gonna equal the same thing.