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Decimals, SM-Bank 076

Manou was cooking a defrosted chicken in his oven and checking its temperature every 7 minutes.

The first temperature taken was \(-8.2^{\circ}\text{C}\).

The second temperature was \(4.2^{\circ}\text{C}\).

The third measurement showed that the temperature had increased one and a half times the previous increase.

What was the third temperature?  (2 marks)

--- 5 WORK AREA LINES (style=lined) ---

Show Answers Only

\(22.8^{\circ}\text{C}\)

Show Worked Solution
\(\text{1st increase}\) \(= 4.2- (-8.2)\)
  \(= 4.2 + 8.2\)
  \(= 12.4\)

 

\(\text{2nd increase}\) \(= 1.5\times 12.4\)
  \(= 12.4 + 6.2\)
  \(= 18.6\)

 

\(\therefore \text{ Third temp}\) \(= 4.2 + 18.6\)
  \(=22.8^{\circ}\text{C}\)

Filed Under: Decimals Tagged With: num-title-ct-core, smc-4461-40-Add/Subtract decimals, smc-4461-45-Multiply/Divide decimals

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