Can you please explain the reasoning behind the answer. A bit confused on why null hypothesis is is rejected

A). (6 points) Conduct a t-test for the studyhours and cumgpa at the 10% level of significance, using a critical t-value of 1.645. What should you conclude? T=B/SE(B) Studyhours~-0.835/0.162~-5.154 Cumgpa ~ 22.211/5.857 ~3.792 Since |T| > 1.645, the null hypothesis that the coefficient is equal to zero (Ho: B=0) is rejected. Both variables are statistically significant