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Carbohydrate present in pizza, cola, and ice cream is $29g$, $51g$and $44g$.

The fat present in pizza, cola, and ice cream is $10g$, $0g$and $28g$.

The protein present in pizza, cola, and ice cream is $13g$, $0g$and $8g$.

The mass of carbohydrate present in pizza, cola, and ice cream is $29g$, $51g$and $44g$respectively.

Hence, the total carbohydrate mass is,

$$\begin{gathered} =29+51+44 \\ =124g \end{gathered}$$

Calculate the energy for each food item based on its mass and energy value, then round to the nearest tenth of a kilocalorie.

Energy (kilocalories) = mass$×$energy value of carbohydrate

Find kilocalories for $124g$of Carbohydrate,

role="math" localid="1651819382725" $$\begin{gathered} =124g×9Kcal \\ =500Kcal \end{gathered}$$

The fat present in pizza, cola, and ice cream is $10g$, $0g$and $28g$

Therefore, the total fat is $10+0+28=38g$

Calculate the energy by multiplying the mass by the energy value.

role="math" localid="1651819365555" $38g×9Kcal=340Kcal$

Pizza, soda, and ice cream all include protein value is $13g$, $0g$and $8g$

Therefore, the total fat is $13+0+8=21g$

Hence, Find Kilocalories for $21g$of proteins

$=21g×4Kcal=80Kcal$

The following are the information for calculating the total kilocalories:

The total kilocalories of Carbohydrate is$500Kcal$

Fat's kilocalories is $340Kcal$

Protein's total kilocalories is$80Kcal$

The total kilocalories for the meal are the sum of the kilocalories of carbohydrate, fat, and protein.

Therefore,

The total calories is,

$$\begin{gathered} =500+340+80 \\ =920Kcal \end{gathered}$$

Hence, the total kilocalories of the meal is$920Kcal$

The following are the given information for find the hours of sitting needed to burn off the kilocalories.

One hour of sitting burn off the$100Kcal$

We need to burn off$920Kcal$

The energy expended for one hour of sitting is $100Kcal$

To burn $920Kcal$, the number of hours of sitting needed is

$$\begin{gathered} =920\mathrm{kcal}×\frac{1\mathrm{hour}}{100\mathrm{kcal}} \\ =9hours \end{gathered}$$

Therefore, the number of hours needed to burn off $920Kcal$by sitting is$9hours$

The following are the given information for find the hours of swimming needed to burn off the kilocalories.

One hour of swimming burn off $500Kcal$

We need to burn$920Kcal$

The energy expended for one hour of swimming is $500Kcal$.

To burn $920Kcal$, the number of hour of running needed

$$\begin{gathered} =920\mathrm{kcal}×\frac{1\mathrm{hour}}{500\mathrm{kcal}} \\ =2hour \end{gathered}$$

Hence, hour required for burn off the $920Kcal$by swimming needed is$2hours$