cccc83 It will be helpful to remember two guidelines about significant figures A

Question

cccc83 It will be helpful to remember two guidelines about significant figures After multiplication or division, the answer cannot have more significant figures than any of the original numbers After addition or subtraction, the answer cannot have more digits to the right of the decimal point than any of the original numbers After determining the appropriate number of significant figures, round off your final answer If the first digit you drop is greater than 5, add 1 to the last digit you keep, You are rounding up If the first drop you drop is less them 5, do nothing to the digits you keep You are rounding down. If the digit you drop is less thin 5, round down by dropping the digits. If the digit you drop is 5 or greater, round up by adding f to leftmost digit. A bakery measured the mass of a whole cake as 0 870 kg A customer bought one slice of the cake and measured the mass of the slice as 0.1151 kg What .s the mass of the remaining cake, without the one slice? Express your answer in kilograms using the appropriate number of significant figures. An unknown object is placed on a balance. which then roods 6.118 g. Its volume is measured to be 3.04 cm^3. Find the density of this object by driving mass by volume.

Explanation / Answer

Answer – Part A) We are given, mass of cake = 0.870 kg

One slice mass = 0.1151 kg

So the remaining mass of cake = whole mass of cake – one slice mass

                                                   = 0.870 kg – 0.1151 kg

                                                  = 0.755 kg

Part B) We are given the, mass of object = 6.118 g , volume = 3.04 cm3

We know density formula

Density = mass / volume

             = 6.118 g / 3.04 cm3

             = 2.01 g/cm3

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