If a number between 0 and 100 is an odd perfect square, then only factors of one number are 1, the number itself, and the square root of the number. What is a counter example for this conditional example

Pls i’m too dumb to know what i’m doing right now

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.