-150t + 50,000 and 50t + 75,000. What is the difference in the populations of the cities when t = 4? sry i suck at math pls answer asap i will mark brainiest or whatever its called

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

3.4a=57.8 what is the the value of a

90.0% complete a b c d e confirm last week, your delivery runs took 7 hours 12 minutes on monday, 6 hours 46 minutes on wednesday, and 6 hours 53 minutes on friday. what was your average time for a delivery run?