a student is trying to identify an unknown substance by finding its density. he finds the mass of a weighing boat to be 2.69 g and the mass of the unknown pieces, including the weighing boat, to be 18.01 g. to find the volume he measured out 25.7 ml of water in a graduated cylinder and then added the pieces to find a new measurement of 32.3 ml.

The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). one cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?

Scientists observed a rock stratum and discovered some fossils. the image shows the fossils they discovered. what can you interpret from the image? an illustration showing layers rock with fossils embedded in some rock layers1. the dinosaur and the mammoth existed after the trilobites.2. the dinosaur and the armored fish existed before the trilobites.3. the trilobites and the armored fish died before the dinosaur.4. the trilobites and the armored fish were born after the dinosaur.5. the early mammoth is older than the trilobites.

You can reduce glare in snowy weatuer by?