1. you have 2 m3 of a mineral ore sample. it has a mass of 1 _ 104 kg. calculate the density of the ore sample and express your results in g/cm3 with appropriate scientific notation

The solution to your problem is as follows:

2 m3 is 2e6 cm3 

1e4 kg is 1e7 g 

so 

d = m/V = 1e7/2e6 = 5 g/cm3

Therefore, the density of the ore sample is 5 g/cm3.


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Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle