Question #f93d9

2 Answers
Nov 27, 2017

That's a gigantic cell!! :O :D
a) #2.56 xx 10^27 "mm"^3# volume
b) #2.56 xx 10^26L#

Explanation:

These are just unit conversions.
#1m^3 = 1 xx 10^9 mm^3#
#1Mm = 1 xx 10^6m#, so #1Mm^3 = 1 xx 10^18m#
#1m^3 = 1000L#

#2.56 Mm^3 xx 10^18m^3/"Mm"^3 xx 10^9"mm"^3/m^3 = #

#2.56 xx 10^27 "mm"^3#

#2.56 Mm^3 xx 10^18m^3/"Mm"^3 xx 1 xx 10^3m^3/L xx 10^5 "cells" = #

#2.56 xx 10^26L#

Nov 27, 2017

(a) #2.56xx10^-9 mm^3#
(b) #2.56xx10^-10 L#

Explanation:

Megameter means a million(#10^6#) meters, or #1000# kilometers. It would be too large to express the size of a bacterial cell.

The following answer is under the assumption that the volume is #2.56# cubic #color(red)"micrometers"#. If you really want the volume of a gigantic bacterial cell, see SCooke's post.

"Micro" means one-millionth(#10^-6#).
#1 μm=10^-6 m#
#1 μm^3 =(10^-6)^3 m^3= 10^-18 m^3#

The volume of the bacterial cell is #2.56xx10^-18 m^3#.

(a) #1 mm^3 = (10^-3)^3 m^3 =10^-9 m^3#
#2.56*10^-18 m^3 = (2.56xx10^-18)/(10^-9) mm^3 = 2.56xx10^-9 mm^3#.

(b) The volume of #10^5# cell is #2.56xx10^-18 *10^5=2.56xx10^-13 m^3#.
As #1# liter is #10^-3# cubic meters, the volume is
#(2.56xx10^-13)/(10^-3) L=2.56xx10^-10 L#.