a scientist has two solutions, which she has labeled solutions a and solution b. each contains salt. she knows that solution a is 55% salt and solution b is 80% salt. she wants to obtain 180 ounces of a mixture that is 60% salt. how many ounces of each solution should she use?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

Convert 2000 swiss francs to dutch guilders

Pranza plotted point a in the coordinate plane below.