Answer:
46.08 inches
Step-by-step explanation:
2.5 pounds weight stretches a spring to 18 inches
A pound weight will stretch 18inches divided by 2.5 pounds
= 7.2 inches
6.4 pounds will stretch = 7.2 X 6.4
= 46.08 inches
Answer:
61°C
Step-by-step explanation:
Newton's Law of cooling gives the temperature -time relationship has:
T (t) = 20 + 75 е⁻(t/50)-------------------------------------------------------- (1)
where Time is in minutes (min) & Temperature in degree Celsius (°C)
During the first half hour, t = 30 mins
Substituting into (1)
T = 20 + 75 е⁻(30/50)
= 20 + 75(0.5488)
= 20 + 41.16
= 61.16°C
≈ 61°C
The answer is A with the slope being 3/2 and the y intercept being -5.
