Answer: 14. 12 sig figs
15. 5 sig figs
Step-by-step explanation:
4. 10^(-1)=0.1 ==> 1 sig fig
10^(-2)=0.01 ==> 2 sig figs
10^(-8) ==> 8 sig figs
4.3020 ==> (4+'.'+302) ==> 1+1+3=5 sig figs
5-1+8=12 sig figs ==> exclude the decimal point since it's not part of sig fig
5. 10^(-2)=0.01 ==> 2 sig figs
2.37 ==> (2+'.'+37) ==> 1+1+2=4 sig figs
2-1+4=5 sig figs ==> exclude the decimal point since it's not part of sig fig
