Which plan to prove △HML≅△HMK CANNOT be used based on the information in the diagram?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error