text: you really don't need a lot of work here\nsince you have 0.000 something you must have 10 to the minus power.\nif you had 0.5 for example it would be 5*10^(-1),\nbut if you had 0.05 it would be 5*10^(-2), so the power depends on the number of digits immediately after "."\n\nIn your case 0.000083 has 6 digits after first zero so it will be\n0.000083=\n83*10^(-6) , but you now that 83=8.3*10=8.3*10^1\n\n83*10^(-6)=\n(8.3)*10^1*10^(-6)=\n(8.3)*10^(1-6)=\n8.3*10^(-5)\n\n\nTherefore the answer is b).