frank wants to ride his bike a total of 1,000 miles. if he rides his bike 6 miles a day how many days will it take him to bike 1,000 miles ?

Ithink the answer is c just trying to others

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