the temperature of a metal increase from 4 degree C to T degree C which is related by the equation T=4(1X2)^x when it was heated for x second.
find:
A_ the temperature of the metal when it is heated for 9 seconds.
B_ the time taken, in second, need to raise the temperature from 5 dgree C to 20 degree C

Question

the temperature of a metal increase from 4 degree C to T degree C which is related by the equation T=4(1X2)^x when it was heated for x second.
find:
A_ the temperature of the metal when it is heated for 9 seconds.
B_ the time taken, in second, need to raise the temperature from 5 dgree C to 20 degree C

anonymous · Answer

Emm, ehat do you mean by (1X2) ?

anonymous · Answer

It state 1.2
the point is at the center

anonymous · Answer

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shane_b · Answer

If it's:$$T=4(1*2)^x$$The basic formula would be:$$T_f=T_i*2^x$$Where Tf and Ti are the final and initial temperatures respectively and x is the time in seconds.

Assuming that's correct...

Part A:$$T_f=4*2^9=?$$
Part B:$$20=5*2^x=?$$Just solve for x in that one.