F(t) = -5t^2 + 20t + 60
-5(t^2 - 4t - 12)
-5(t + 2) (t - 6)
t = -2 or t = 6
6 seconds
Answer:
the answer is 123
Step-by-step explanation:
cuz thats wat it is cux i think so
Answer:
267946.7
Step-by-step explanation:
here's the formula
V=4
/3πr3
If 25% is 80, 100% is 320. 60% of 320 is 192.
Answer:
1) f(3) means the temperature after 3 seconds
2) f(3) = 22 + 1.3(3) = 25.9
Temperature after 3 seconds is 25.9°C
3) f(t) = 35 means after t seconds, temperature was 35°C
4) 35 = 22 + 1.3t
1.3t = 13
t = 10 seconds
