In her first five weekly shopping trips on Saturdays, Angela spends $14, $7, $14, $7 respectively to ensure that she has enough stock of her new daily vitamin pill to last for the week without spending more than she needs to.Which one of the following would explain this variation?
Correct answer: B. The pills are sold in packets of 5
- A. The pills are sold in packets of 4
- B. The pills are sold in packets of 5
- C. The pills are sold in packets of 6
- D. The pills are sold in packets of 7
Explanation
The correct answer is Option B: The pills are sold in packets of 5.If Angela buys pills in packets of 5, she would have to buy additional packets some weeks to cover all 7 days, leading to the varying costs of $14 and $7. For example, in weeks where she needs 7 pills, she would buy two packets (10 pills), spending more. In other weeks, if she has leftover pills, she may only need one packet.Option A is incorrect because packets of 4 would require a consistent number of packets weekly, not matching the cost variation. Option C is incorrect because packets of 6 would also not match the spending pattern. Option D is incorrect because packets of 7 would mean she buys one packet per week, causing no cost variation.
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Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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