Atank contains 1860 l of pure water. a solution that contains 0.01 kg of sugar per liter enters a tank at the rate 9 l/min the solution is mixed and drains from the tank at the same rate. (a) how much sugar is in the tank initially? (kg) (b) find the amount of sugar in the tank after t minutes. amount = (your answer should be a function of t) (kg) (c) find the concentration of sugar in the solution in the tank after 45 minutes. concentration = (kg/l)

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account

Gray looks up the definition of point. a point is a location in a region. what is true about the statement describing the word point? 1. the statement uses the terms location and region that are defined based on an understanding of a point. 2.the statement precisely defines the concept of a point. 3. the statement does not include information needed to fully define a point. 4. the statement is an incorrect description of a point because it does not use mathematical words.