Write a recursive rule for the sequence. –2, 4, –8, 16, . . .
1 answer:
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Step-by-step explanation:
Let the required number be x.
According to the given information:
Hence the required number is 31.
Answer:
After 15 minutes, the temperature of both the furnaces will be same.
Step-by-step explanation:
Let be the minutes when the temperature of both becomes same.
Now, as per question:
Temperature of the furnace after minutes that is cooling at the rate of 15 degree per minute is given as:
Temperature of the furnace after minutes that is heating at the rate of 5 degree per minute is given as:
Now, equating both the temperatures, we get
Therefore, after 15 minutes, the temperature of both the furnaces will be same.