🖐🏼Calculate angle x below:

👉🏼Write 8200000 in standard form

👈🏼Simplify

👆🏼Solve 2x^{2}+3x-2 ≤ 0

👇🏼Represent the following information on a Venn diagram: ξ = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}, A = {multiples of 3}, B = {multiples of 4}