What is the correct substitution of the values a, b, and c from the equation 0=-3x^2-2x+6

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar