Brine is a solution of salt and water. if a tub contains 50 gallons of a 5% solution of brine, how much water must
evaporate to change it to an 8% solution?

Let be the amount of water that evaporates. At the start, the solution in the tub consists of 2.5 gallons of salt (5% of 50 gallons). After gallons of water evaporates, we're left with a solution with total volume gallons, and 8% of this amount should be salt, or gallons of salt. The amount of salt in the tank before and after evaporation remains unchanged, so

gallons of water need to be evaporated.

d) 30 units^2

area of rectangle = l × b

we know,

length = 10 unit

breadth = 3 unit

applying the formula,

= l × b

= 10 × 3

= 30 unit^2

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28

step-by-step explanation:

because that's the answer