Are the results of a thoroughly tested hypothesis?

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?