Question

There are about 37 trillion (37,000,000,000,000) cells in the human body.

(a) If each cell were as big as the tip of a fine point pen tip (0.5 mm), and the 37 trillion pen tips
were set out side-by-side in a long line, how many miles long would that line be? (There are
1000mm in 1 m, 1000 m in a km, and 1.609 km in a mile.)

(b) The average distance from the earth to the moon is 238,900 miles. How many times could
you stretch the line of pen tips from the earth to the moon?

Answer 1

Answer:

11,497,824.74 miles.

768,780,200,000 pen tips.

Step-by-step explanation:

(a) The length in km = 37,000,000,000,000 * 0.5 / 1,000,000

= 37,000,000 * 0.5

= 18,500,000 km

= 18,500,000 / 1.609

= 11,497,824.74 miles.

(b) 238,900 * 1.609 = 384,390.1 km.

Number of pen tips = 384,390 * 1000*1000 / 0.5

= 768,780,200,000.