The concentration, in parts per million, of a type of antibiotic in a human’s bloodstream after h hours can be modeled by the polynomial function c(h) = -0.09h2 3.5h 8. what is the concentration of the antibiotic after 3 hours?

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12