I need a full explanation on - (i^2)

I know it equals 1, but how?

Lebron scored a basket 72 times out of 150 shots. what percent of his shots did he score? a. 42% b. 50% c. 48% d. 63%

To win at lotto in one state, one must correctly select 4 numbers from a collection of 61 numbers (1 through 61 ). the order in which the selection is made does not matter. how many different selections are possible?

A submarine dives at an angle of 13 degrees to the surface of the water. The submarine travels at a speed of 720 feet per minute. About how deep is the sub after 5 minutes?

Keith buys a house for £270 000 and sells it two years later for £300 000. What is his percentage profit? Give your answer to 2 significant figures.

The school you want to go to has an acceptance rate of 15%. That means that 15%of the students who apply to the school get in. The school took in 1800 students last year. How many students applied?

Joni put $200 in an interest-bearing account with an annual compound interest rate of 5%. Joni determined that after 3 years, she will have a total balance of $230. Her work is shown below. Step 1: P = 200, r = 5, t = 3 Step 2: I = 200 ∙ 0.

What is (13x + 9x) + (17k + 6k), simplified?

Which ordered pair represents the solution to the system of equations? {4x-2y=18-3x-4y=-8 (4, - 1) (5, 1) (-1, 4) (43, 1)

532.0419 what is the place values

Tobias has 12 coins in his pocket. Of these coins, 8 were made in the year 2000, and 4 were made in the year 2005. Tobias randomly selects one coin from his pocket and, without replacing it, selects another coin from his pocket.