In a Nicd 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 Proportions Found Charge 0.15 +2 0.35 +3 0.33 +4 0.17 Determine the mean and variance of the nickel charge. a. None among the choices O b. µ = E(X) = 2.29 o? = V (X) = 1.53 O. µ = E(X) = 2.37 o? = V (X) = 1.47 %3! O d. u = E(X) = 2.29 O = 1.53

How long will it take to count 1 million USD at the rate of 8 hours per day? 1 USD = 1 second.

Jim found out that after working for 4 months he had earned 3 days of vacation time. How many days of vacation time per year does he earn at this rate? He earns days of vacation time per year.

How do i count out. Lisa and Josef live 37.5 kilometer apart. Lisa is biking 10km/h faster than Josef. After 45 minutes they are meeting. How fast are they both biking?

Angela took her 2 year lease on a new car and after 4 months of driving she put 6000 miles on it the Lisa loves 10000 miles per year if her driving habits stay consistent will she stay under the allotted mileage for 2 years by how much