Answer:
a) 29.45 cm (2 dp)
b) 220.89 cm² (2 dp)
Step-by-step explanation:
<u>Formula</u>



<u>Calculation</u>
Given:
- r = 15 cm


Answer:
899 would be your answer
Step-by-step explanation:
10x5=50
50+30=80
80+20=100
100x10=1000
1000-100=900
900-1=899
Hope this helps you!
Answer:

Explanation:


Look the the 'to the power' above 10. The greatest number to the power is the greatest number. Here 6>4
Therefore, 
Superman flies 3388 meters for 14 seconds because if he flies for 7 seconds and gets 1694 meters then just times it by 2.