Answer:
9.6
Step-by-step explanation:
use a big brain and dont cheat
1) 9 min 36 sec (9.6min)
2) 15 cm
10 cm -->4 min
1 cm --> 0.4 min
24cm --> 9.6 min
15 cm--> 6min
NO THOS IS NOT TRUESNBDJDN
29 and 31 are the only primes.
11