Rahms spent two and a half hours writing an essay it took him 4 times as long to finish his science project how long did it take rahm to write the essay and finish the science project

You multiply 2 1/2 (2.5) hours time 4 and you answer is 10

Google it that might work

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