11. In einem Laden werden drei Sorten Honig angeboten: Berghonig. Blütenhonig und Lavendelhonig. Zwei Gläser Berghonig zu je 500 g kosten zusammen 14.40 Fr . Ein Glas Blütenhonig zu \( \frac{4}{5} \) kg kostet 11 Fr. Ein Glas Lavendelhonig zu 0.35 kg kostet 6.30 Fr . Berechne den Preisunterschied zwischen der teversten und der billigsten Sorte.

Work out \( \left(4.2 \times 10^{11}\right)-\left(7 \times 10^{9}\right) \)

Whork out \( \left(14.2 \times 10^{112}\right)-\left(7 \times 10^{2}\right) \)

b) Let's take a number 260 . (i) Find the square root of 260 by division method. (ii) What is the remainder left in this process? (iii) Subtract the remainder from 260 . Is the difference a perfect square?

A tree grows to a height of 32.4 metres over period of \( 8 \frac{1}{2} \) years. What is the average annual growth rate in metres per year?

a.013 hectogram = how many decigram \( \begin{array}{ll}1) 0.13 & \text { (2) } 1.3\end{array} \)