WhAt DiD ThE cOw SaY WheN SoMeThInG WaS iN iTs WaY?

What scale factor was applied to the first rectangle to get the resulting image interior answer as a decimal in the box

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

The sum of the speeds of two trains is 720.2 mph. if the speed of the first train is 7.8 mph faster than the second train, find the speeds of each.