Final answer:
The length of an eastern gray tree frog tadpole is written as a decimal as 5.22 centimeters.
Step-by-step explanation:
The length of an eastern gray tree frog tadpole is five and twenty-two hundredths centimeters. To write this length as a decimal, we can rewrite it as a mixed number, which is 5 22/100. Then, we can convert the mixed number to a decimal by dividing the numerator (22) by the denominator (100). 22 divided by 100 is 0.22. Therefore, the length of the eastern gray tree frog tadpole is written as a decimal as 5.22 centimeters.