9 For a soccer carnival, Derek is mixing the cordial which uses a ratio of 40 mL cordial to 750 mL of water. If he needs to add cordial to 10 litres of water, how much cordial is needed? State your answer in millilitres, correct to one decimal place. ( 3 marks)

4. In the vector space \( P_{2}(R) \) over the field \( R \). Show that the set \[ M=\left\{P(x) \in P_{3}(R) \mid P(0)=\right. \]

1. \( \sqrt{-44} \)

Calcule 1 a) \( \sqrt{16} \) b) \( \sqrt[3]{-27} \) c) \( \sqrt[5]{0} \) d) \( \sqrt[4]{4096} \)

Q.11) Diagonal \( A C \) of a rhombus \( A B C D \) is equal to one of its side \( B C \). Find all the angles of the rhombus.

Question 9 A rhombus of the length 17 and the length of one of its diagonals is 16 . Find the length of the other diagonal. A. 15 B. 30 C. 32 D. 34 E. \( \sqrt{545} \)