Which of the following shows 2.1851 rounded to the nearest tenth?

a. 2.1
b.2.185
c.2.19
d.2.2

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

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount

Mariano delivers newspaper. he always puts 3/4 of his weekly earnings in his savings account and then divides the rest equally into 3 piggy banks for spending at the snack shop, the arcade and the subway