The object on the right is made from a squared based pyramid joined to a cuboid. the base of the cuboid and the base of the pyramid are both squares of side 6cm
the height of the cuboid is 9cm and the total height of the object is 17cm
the total mass of the object is 970g
the cuboid is made from wood with density 0.68g/cm³
the pyramid is made from steel
calculate the density of the steel in g/cm³
YOU MUST SHOW YOUR WORKING OUT!

Mercury poisoning is dangerous overload of mercury within the body. a major source of mercury within the body, a major source of mercury poisoning is consuming fish that contain mercury. certain fish are more prone to having higher levels of mercury than others. the pie chart shows the distribution of four breeds of fish at a hatchery. the hatchery has approximately 6,000 fish. a biologist from the centers for disease control and prevention randomly test 5% of each breed of fish for mercury content. her findings are shown in the following table. based on the biologist's findings, if a single salmon is randomly selected from those that were tested, what is the probability that this particular fish would have a dangerous mercury level? a) 0.001 b) 0.004 c) 0.02 d) 0.08

Manny bought 12 pounds of vegetables at the supermarket. 75% of the vegetables were on sale. how many pounds of vegetables were not on sale? 98 points : )

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11