A piece of cardboard is 12.0 cm long, 6.3 cm wide and 0.75 millimeters thick. What is the volume of this piece of cardboard in cubic meters? Enter your answer in the space provided WITHOUT units. Make sure to round your answer to the correct number of significant figures. Please give the number as a normal number, do not use scientific notation. (In example: a normal number = 4300 instead of the number being in scientific notation as = 4.3 X 103)

A certain city covers an area of 66.4 mi2. How many square kilometers is this? Use the conversion factor 1 mile = 1.61 km. Report your answer to the appropriate number of significant figures.

Please don't provide handwriting solution

A student uses a 100.00 mL volumetric flask to determine the density of a sample of water.  The mass of the dry empty flask is determined to be 80.354 g.  The flask is filled to the line 5 times with the water sample and the mass of the flask and the water is determined each time giving the 5 masses below.  measurement 1:  172.275 g measurement 2: 172.288 g measurement 3: 172.28 g measurement 4: 172.263 g measurement 5: 172.378 g Based on the data given above, what is the average density of the sample in g/mL based on those measurements?  Enter your answer with 3 significant figures.

The diameter of an atom is approximately 1 x 1010m. What is the diameter in millimeters? (Hint, your answer will be in scientific notation, use the format of 1x10-??mm.) (please provide your answer in scientific notation with the correct number of significant digits and units.)

Use calculator to solve the problems. Write your answer in the correct scientific notation with the correct number of sig fig. Enter numbers only, no units. Enter scientific notation as (number)E(exponent) for example: enter 2 x 104 as 2E-4 (note there are no spaces) (9.4 x 10° mm) (4.5 x 10° mm) =

A solution is prepared by dissolving 7.871 mL of ethanol in 76.454 mL of water. What volume (in mL) of ethanol is present in 145.692 mL of this solution? Provide your response to two digits after the decimal.

How many miles in 1.2 x 104 yards? Along with the conversions from your equation sheet, you will need to know that 3 ft = 1 yard (this conversion is exact). Enter your unit as mi.  Make sure you include the appropriate units and significant figures. Write your work using dimensional analysis

In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun, but occupying less space than our moon. Suppose that one of these black holes has a mass of 1×10^3 suns and a radius equal to one-half the radius of our moon. What is its density in grams per cubic centimeter? The mass of the sun is 2.0×10^30 kg and the radius of the moon is 2.16×10^3 mi (Volume of a sphere =4/3πr^3)

Perform the calculations below and give the results with correct significant figures. 31.816 g + 4.23 g + 0.097 g = 3.48 m × 5.916 m × 19.27 m = (0.0451 × 2.007 × 104) − (28.16 ÷ 0.874) =  g  m3