Express the following in centimetres (cm) in exponential notation :

(i) 98 hm

(ii) 156 km

(iii) 371 m

3² + 2³ is equal to :

1. 15
2. 16
3. 17
4. 18

(-5)⁴ is equal to :

1. 20
2. -125
3. 625
4. -1024

$\Big(\dfrac{-3}{5}\Big)^5$ is equal to :

1. $\dfrac{-243}{3125}$

2. $\dfrac{-81}{625}$

3. $\dfrac{81}{625}$

4. $\dfrac{512}{1875}$