An item costs $410 before tax, and the sales tax is $20.50 . find the sales tax rate. write your answer as a percentage.

Asap! i'm not good math and i'm lost.

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

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