The estimate would be 1/5 or 20%. The actual is 5/28 or 17.86%
There is no correct estimate because sqrt(28) is an irrational number and it is always possible to improve on an estimated value.5^2 = 256^2 = 36 so the estimate is between 5 and 6.5.25^2 = (5 1/4)^2 = (21/4)^2 = 441/16 = 27.5 so 5.25 is a better estimate.
The EPA mileage estimate for the 2009 BMW 5-Series is 18 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2010 BMW 5-Series is 18 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2006 BMW 5-Series is 18 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2008 BMW 5-Series is 18 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2007 BMW 5-Series is 18 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2012 Mazda MX-5-Miata is 22 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2014 Mazda MX-5-Miata is 22 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2010 Mazda MX-5-Miata is 22 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2009 Mazda MX-5-Miata is 22 mpg in the city, 28 mpg on the highway.
The EPA mileage estimate for the 2013 Mazda MX-5-Miata is 22 mpg in the city, 28 mpg on the highway.