Through calculations, Kelsey and Jack estimated the diameter of the fountain in the park.

A drawing of two students and their approximations is shown. Jack: the square root of two hundred feet. Kelsey: fifteen and four tenths feet.

If the actual length is 15 feet, which student’s estimate is more accurate? Explain your reasoning.

Select the answers from the drop-down lists to complete the sentence.

200−−−√≈

, so
estimate is more accurate.