Answer: Option c.
Step-by-step explanation:
We know that the first month's interest payment was $477.82, therefore, we can calculate the Annual interest multiplying this first month's interest payment by 12:
[tex]Annual\ interest=\$477.82*12\\\\Annual\ interest=\$5,733.84[/tex]
Dividing it by the interest rate (Remember that [tex]7.125\%=\frac{7.125\%}{100}=0.07125[/tex]), we get:
[tex]\frac{\$5,733.84}{0.07125}=\$80,474.94[/tex]
Finally, since Kate and Bill secured a loan with a 75% loan-to-value ratio, we get:
[tex]\frac{\$80,474.94}{0.75}=\$107,299.92 \approx\$107,300[/tex]