A scientist needs 10 liters of a 20% acid solution for an experiment, but she has only solutions of 5% and 40% concentrations. To the nearest tenth of a liter, how many liters of each solution should she mix to get the solution she needs? Choose the equation to match the situation. A. (0.20)(10) = 0.05x + 0.40x
B. (0.20)(10) = 0.05x + 0.40 (10 – x)
C. (0.20)(10) = 0.05(10) + 0.40(10 – x)
D. (0.20)(10) = 0.05(10 – x) + 0.40(10 – x)

What is the value of this expression when b= 5 6 (2b-4)

What is the volume of the sphere shown below with a radius of 3?

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $