A hot cup of coffee cools exponentially with time as it sits on the
teacher's desk. Its change in temperature, T. measured in °C, with
respect to time, t, in minutes, is modeled with the following function
T=82(0.6) É + 20
What is the coffee's temperature after 30 minutes?
a 54°C
b43°C
C 73°C
d = 31°C

2 over 5

step-by-step explanation:

the 2: 3 ratio is the length of the ac segment to the cb segment total length. this implies that the ratio between segment ac length and segment ab length is 2: 5. point c is 2/5 from a to b, so the required fraction is 2/5.

b

2

−

b

b

3

+

7

b

2

+

14

b

+

6

%

−

3

b

3

+

7

b

2

+

14

b

+

6

%

step-by-step explanation:

c

step-by-step explanation: