What is 26.553 rounded to the nearest hundreth

The parabola opens: y=√x-4 (principal square root) up down right left

Nick and nora are married and have three children in college. they have an adjusted gross income of 47,400. if their standard deduction is 12,600 itemized deductions are 14,200 and they get an exemption of 4000 for each adult and each dependent what is their taxable income

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