A scientist needs to make 2 liters of saline solution (salt water), in which the salt level must be at 15% concentration (meaning 15% of the water is salt).
Unfortunately, the scientist only has two types of saline solution in his
possession. He has saline solution with a 10% concentration level and saline
solution with a 35% concentration level.
10
How much of each type of saline solution should the scientist mix together to
achieve 2 liters of saline solution at a concentration level of 15%?
11
Let I represent the amount 10% saline solution and let y represent the amount
of 35% saline solution.
12
13

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone

Polygon abcde and polygon fghij are similar. the area of polygon abcde is 20. what is the area of fghij?