CH4(g) + 2O2(g) → CO2(g) + 2H2O(l): ΔH = −890 kJ Which statement about this reaction is correct? (3 points) Group of answer choices The reaction of one mole of oxygen (O2) absorbs 445 kJ of energy. The reaction of one mole of methane (CH4) absorbs 890 kJ of energy. The reaction of one mole of oxygen (O2) releases 445 kJ of energy. The reaction of two moles of methane (CH4) releases 890 kJ of energy.

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)

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?