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Triss [41]
3 years ago
14

Cat food is normally $30. How much will cat food cost if it is put on sale for 30% off? Round to the nearest dollar.

Mathematics
1 answer:
alexira [117]3 years ago
7 0

Answer: $21

Step-by-step explanation:

30/100 = 0.3

0.3 * 30 = 9

30 - 9 = 21

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Big Ben, the famous clock tower in London, has a minute hand that is 14 feet long. How far does the tip of the minute hand of Bi
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Answer:

36.65 ft (2 dp)

Step-by-step explanation:

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Therefore, the minute hand of a clock travels 360° in 60 minutes

Number of degrees the minute hand will travel in 25 minutes:

\sf =\dfrac{360}{60} \times 25=150^{\circ}

To find how far the tip of the minute hand travels in 25 minutes, use the Arc Length formula:

\textsf{Arc length}=2 \pi r\left(\dfrac{\theta}{360^{\circ}}\right)

\textsf{(where r is the radius and}\:\theta\:{\textsf{is the angle in degrees)}

Given:

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\begin{aligned}\implies \textsf{Arc length} &=2 \pi (14)\left(\dfrac{150^{\circ}}{360^{\circ}}\right)\\ & = 28\pi \left(\dfrac{5}{12}\right)\\ & = \dfrac{35}{3} \pi \\ & = 36.65\: \sf ft\:(2\:dp)\end{aligned}

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The boss gives all his employees a 4% pay rise.
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