Homework help- Math?
Anthrax spores, which were inhaled by postal workers, causing severe illness and death, are no larger than 5 microns in diameter. If a standard postal envelope is 3.5 inches by 5 inches, how many spores could be on a standard envelope? (Note: a micron is the same as a micrometer)
I don t even know where to begin
- davidLv 74 weeks agoBest answer
convert inches to cm - m - micrometers
3.5in X 2.54cm/in X 1m/100cm X 10^6 micrometers/m = 88900microns
each spore has diameter 5 microns ... 88900/5 = 17780 spores along the width of the envelope
similarly the length of 5 in becomes 25400 spores
total on one side of the envelope = 25400 X 177800 = ??
total on BOTH sides = 2 X 25400 X 177800
= 903,224,000 spores.
- 4 weeks ago
- 4 weeks ago
Which sentence includes an adjective clause that is constructed using a relative pronoun?
Group of answer choices
In Appalachian culture, the wooly worm is considered a sign that winter is coming.
The number and width of black bands on a wooly worm are used to predict how harsh the winter will be.
Some towns host wooly worm festivals with worm races, costume contests, and special treats.
The wooly worm, which is covered with wooly brown and black “fur,” emerges in mid-autumn.
- ♥Lv 74 weeks ago
You need to convert micrometers to inches. There are 25,400 micrometers in 1 inch. Then you can calculate it.