Find the area of the following shape​

Which of the following is a function? a.) {(-2, -4/5), (-1,-,,-1)} b.) {(-2,,1/,3/,1)} c.) {(-22)} d.) {(-21)}

Write the expression as a single natural logarithm. 2 in a - 4 in y

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