so what you do is you use the formula shown below:
specific heat capacity = energy required / (mass * change in temperature)
here ,
energy required = 10.0°C Note that cal. is short form for °C
mass (m) = 3.1g
change in temperature (ΔT) = 17.9°C Note that "ΔT" means change in temperature
So, plugging the values into the formula, we get,
Specific heat capacity= [tex] \frac{10}{3.1*17.9} [/tex]
= [tex]0.1802126509[/tex]
= 0.1802 cal./g°C i rounded the answer to the fourth decimal point