If a math expert can help me with like 3 topic I would greatly appreciate I’m 16 I don’t think there that hard I’m just really bad at math please help

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.