Please i need help with this rn

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Which of the following describes the graph of y--4x-36 compared to the parent square root function? stretched by a factor of 2, reflected over the x-axis, and translated 9 units right stretched by a factor of 2, reflected over the x-axis, and translated 9 units left stretched by a factor of 2, reflected over the y-axis, and translated 9 units right stretched by a factor of 2, reflected over the y-axis, and translated 9 units left save and exit next submit