Radiometric dating of a sedimentary rock sample shows an age of 1.5 million years. What conclusions can be drawn from this data? The rock is a maximum of 1.5 million years old but it may be younger.
The rock is a minimum of 1.5 million years old but it may be older.
Radiometric dating cannot be used on sedimentary rock so no conclusions can be drawn.
The rock is exactly 1.5 million years old.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate