An article presents a method, based on a modal pushover analysis, of estimating the hysteretic energy demand placed on a structure by an earthquake. a sample of 18 measurements had a mean error of 457.7 knm with a standard deviation of 317.7 knm. an engineer claims that the method is unbiased, in other words, that the mean error is 0. can you conclude that this claim is false? find the p-value and state a conclusion.

Will you chech and finish these for me, because i am stumped with them.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?