Question

A fish company delivers $22\mathrm{kg}$of salmon, $5.5\mathrm{kg}$of crab, and $3.48\mathrm{kg}$of oysters to your seafood restaurant. (2.3,2.6 )

a. What is the total mass, in kilograms, of the seafood?

b. What is the total number of pounds?

Short answer

a) The total mass of the seafood in kilograms is determined as$31kg$

b) The total number of pounds is determined as$68pounds$

Step-by-step solution

Introduction (part a)

The given is the weights of the Salmon, crab, and oyster

The objective is to determine the total mass of seafood and total number of pounds

Explanation (part a)

(a) Mass of salmon $=22\mathrm{kg}$(zero decimal places)

Mass of crab $=5.5kg$(one decimal place)

Mass of oysters $=3.48\mathrm{kg}$(two decimal places)

$Totalmassofseafood=Massofsalmon+MassofCrab+Massofoysters.$

$$\begin{gathered} =22kg+5.5kg+3.48kg \\ =30.98kg \end{gathered}$$

We must round off to zero decimal places because the least number of decimal places is zero., Since $9\ge 5$, we add 1 to zero giving $31\mathrm{kg}$

Introduction (part b)

The given is the weights of the Salmon, crab, and oyster

The objective is to determine the total mass of seafood and total number of pounds

Explanation (part b)

(b)

As $1\mathrm{kg}=2.20$ pounds

So $31kg=31\times 2.20pounds=68.2$ pounds

$31$ has $2$ signiflcant flgures

$2.20$ has $3$ signiflcant flgures

So rounding off to $2$significant figures (least number) gives us $68$ pounds