Help please!! can someone explain to me how to do this?

Which of the following is correct interpretation of the expression -4+13

Beth divided 9 ounces of her granola recipe into 4 equal-sized amounts. she placed the amounts into individual bowls. the fraction 9/4 represents the number of ounces of granola in each bowl. which other number represents the amount of granola beth has in each bowl? (a) 1 1/4 (b) 2 1/4 (c) 1 3/4 (d) 3 3/4 i need !

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle