"After washing your hands for twenty seconds, you leave 8 bacterial cells using a new bar of soap. After 24 hours of the soap sitting in a soap dish, you dilute 1g of of the soap 1:1,000,000 and plate it on heterotrophic plate count agar. After 24 hours, there are 150 colonies. How many bacteria are on the soap piece before the dilution

150,000,000 bacteria are on the soap piece before dilution.

Explanation:

The dilution factor is 1:1,000,000 or (1/1,000,000) This means that the 1g of soap was diluted 1,000,000 times.

After 24 hours, there are 150 colonies.

To get the number of bacteria before dilution, we simply multiply the number of colonies by the denominator of the dilution factor which is 1,000,000. We have:

150 x 1,000,000

= 150,000,000

Therefore, there were 150,000,000 bacteria before dilution.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

i think the answer is c hope this