A single card is drawn at random from a standard 52 card check. Work out in its simplest form

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

When x = 3 and y = 5, by how much does the value of 3x2 – 2y exceed the value of 2x2 – 3y ?

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years