Please can you help me

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm