Mark is a professional race car driver. he has completed in 15 races and won 40% of them. how many races has mark won ?

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

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.