Question

INTERMEDIATE LEVEL
8°C before it is left
e metal falls at a
first 3 minutes,
next 15 minutes
7. A piece of metal is heated to 428 °C befo
to cool. The temperature of the metal fa
rate of 23 °C per minute for the first 3 m
at a rate of 15 °C per minute for the next 15 m
and then at a rate of 8 °C per minute until it rea.
room temperature of 25 °C. Find
1980) the temperature of the metal after 9 minutes
2-(i) the total time needed for the metal to reach
temperature of 25 °C from 428 °C.​

Answer 1

Answer:I hope you under stand the answer