Lisa paid $43.95 for 16.1 gallons of gasoline. what was the cost per gallon, rounded to the nearest hundreth? show your work

The highest common factor of 132 and 220

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

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?