The mass of a dust particle is approximately 7.5×10−10 kilograms and the mass of an electron is 9.1×10−31 kilograms. Which expression would you use to find out how many electrons you need to equal the mass of one dust particle?(1 point) Responses (7.5×10−10)÷(9.1×10−31) open paren 7 point 5 times 10 to the negative 10 power close paren divided by open paren 9 point 1 times 10 to the negative 31 power close paren (7.5×10−10)(9.1×10−31) open paren 7 point 5 times 10 to the negative 10 power close paren times open paren 9 point 1 times 10 to the negative 31 power close paren (9.1×10−31)÷(7.5×10−10) open paren 9 point 1 times 10 to the negative 31 power close paren divided by open paren 7 point 5 times 10 to the negative 10 power close paren (9.1×10−31)−(7.5×10−10) open paren 9 point 1 times 10 to the negative 31 power close paren minus open paren 7 point 5 times 10 to the negative 10 power close paren (9.1×10−31)(7.5×10−10)
