Robin thinks that 4z+5x^2 is the same as 9x^3. Which statement shows that it is NOT the same?

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Anyone know these questions? i need ,.

Grading scale 1 has the following weights- (tests- 50% quiz- 25% homework- 15% final exam- 10%). calculate your final average if your performance in the class is as follows-test grades- {88, 84, 90, 75, 70, 81); quiz grades- {88, 67, 90, 90, 45, 99, 76, 98, 100}; homework- 90; final exam- 75