To which integer is the square root of 211 closest to?

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Asif spent $745.10 on 13 new file cabinets for his office. small file cabinets cost $43.50 and large file cabinets cost $65.95. write and solve a system of equations to find the number of small cabinets and large cabinets he purchased. determine if each statement is true or false. 1. he purchased 5 small cabinets. true or false 2. he purchased 7 large cabinets. true or false 3. he spent $527.60 on large cabinets. true or false