During a football match a player ran 7.8 km, correct to I decimal place, Complete the statement about the distance, d km, the player ran during the football match.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of