Covert 5/8 into a decimal

What number line represents the solution set for the inequality -1/2 greater than or equal to 4

Can someone me find the original price? the discount is 5% and the sale price is $68.40

Write the component forms of vectors u and v, shown in the graph, and find v − 2u. u= (< -3, -2> , < -3, -1> , < -2, -2> , < -2, -1> ) v= (< -5, 1> , -4, 0> , < 0, -4> , < 1, -5> ) v-2u= (< 5, 3> , < 0, 4> , < 4, 0> , < 5, -3>