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------------------------------------------------ Task 3: Evaluate Questions

The table below shows information about three methods of contraception:

[tex]\[
\begin{array}{|l|c|c|c|}
\hline
& \text{Condom} & \text{Oral contraceptive} & \text{Hormone skin patch} \\
\hline
\begin{array}{l}
\text{Percentage (\%) effectiveness}
\end{array} & 98.0 & 99.7 & 99.8 \\
\hline
\begin{array}{l}
\text{How contraception is obtained}
\end{array} &
\begin{array}{c}
\text{From shops or} \\
\text{sexual health clinic}
\end{array} & \text{From doctor or sexual health clinic} & \text{From doctor or sexual health clinic} \\
\hline
\begin{array}{l}
\text{Possible side effects}
\end{array} &
\begin{array}{c}
\text{No serious} \\
\text{side effects}
\end{array} &
\begin{array}{c}
\text{Headaches,} \\
\text{nausea, high} \\
\text{blood pressure}
\end{array} &
\begin{array}{c}
\text{Headaches,} \\
\text{nausea, blood} \\
\text{clots}
\end{array} \\
\hline
\end{array}
\][/tex]

Evaluate the use of these contraceptive methods.

---

A student needs a new power source for their mobile phone.

The table below gives data about the different power sources:

[tex]\[
\begin{array}{|l|c|c|}
\hline
\text{Power source} & \text{Number of charges} & \text{Mass in grams} \\
\hline
\text{Compact} & 1 & 100 \\
\hline
\text{Large} & 5 & 200 \\
\hline
\text{High capacity} & 10 & 600 \\
\hline
\end{array}
\][/tex]

A salesperson suggested that the student choose the large power source.

Evaluate this decision.

Sure, let's evaluate each part step-by-step based on the information provided.

### Part 1: Evaluating Contraceptive Methods

1. Effectiveness:
- Condoms have an effectiveness of 98.0%.
- Oral contraceptives are slightly more effective at 99.7%.
- Hormone skin patches are the most effective with a 99.8% effectiveness rate.

2. How They Are Obtained:
- Condoms can be obtained from shops or sexual health clinics, making them easily accessible.
- Oral contraceptives and hormone skin patches need to be obtained from a doctor or a sexual health clinic, which might make them less convenient in terms of access compared to condoms.

3. Possible Side Effects:
- Condoms are noted to have no serious side effects, making them a safe option.
- Oral contraceptives can cause headaches, nausea, and high blood pressure.
- Hormone skin patches have side effects like headaches, nausea, and the risk of blood clots.

### Part 2: Evaluating the Mobile Phone Power Source Decision

We need to assess the decision of choosing the Large power source.

1. Number of Charges and Mass:
- Compact Power Source: Provides 1 charge and weighs 100 grams.
- Large Power Source: Offers 5 charges and weighs 200 grams.
- High Capacity Power Source: Gives 10 charges and weighs 600 grams.

2. Charging Efficiency:
- To evaluate efficiency, we compare the number of charges relative to their weight:
- Compact Efficiency: 0.01 charges per gram
- Large Efficiency: 0.025 charges per gram
- High Capacity Efficiency: Approximately 0.0167 charges per gram

3. Best Choice Analysis:
- The Large Power Source has a balance of more charges (5) while maintaining a moderate weight (200 grams).
- While the High Capacity Power Source provides the most charges, it is heavier, making it less ideal if portability is a priority.
- The Large option seems to be a reasonable compromise between the number of charges and the weight of the device.

In conclusion, while the Large power source offers a good balance in terms of efficiency, it is important to consider personal needs like portability and charging requirements when making a decision.