No links Pls Aproximating Irrational Numbers

Which of the following numbers are closest to 7?

A. √50
B. √47
C. √51
D. √46

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c