Express the answer in scientific notation and with the correct number of significant figures: (6.32 x 10-4) ÷ 12.64

a) 5*10^-5
b)5.00*10^-5
c)5.000*10^-5

Can someone me with 3 and 4 plz. this is for masteries test.

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.

What is true for a substance that releases energy