What is X? combined with 10x^2

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

The length of the largest fish is 967.74 times greater than the length of the smallest fish. select a variable expression that shows the length of the largest fish, if 8 is the length of the smallest fish. a. s + 967.74 b. \[ \frac{967.74}{s} \] c. 967.74 - s d. 967. 74s

How do i do this activity, is appreciated