First you must divide 4.8x10^24 by avagadros number(6.02x10^23) doing this will convert 4.8x10^24 atoms into moles
Next take the moles and multiply it by the molar mass of strontium to get the mass in grams
Multiply the number of mole by the molar mass of strontium(88g/mol)
the answer is definitely c.
the answer is:
line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).