Fiona starts at the beginning of a hiking trail and walks 4/5 of a mile. she counts the mileage markers that are placed every 1/10 of a mile along the trail. how many markers does she count?

She walks 4/5 which is the same as 8/10 (denominator and numerator both doubled) 
if theyre placed at every tenth of a mile and she walks 8 tenths .. she would count 8 ?? 

Ac equals 35 cm long

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post