Answer:
20%
Step-by-step explanation:
That’s because 3/15 = 1/5, which is 20%
200-50=150
150/6=25
Sally will have to sell 25 pies to reach her goal.
The area of the circle would be 0.97
Answer
According to newton law of cooling

and

now At Ta = 100
T₀ = 10 °C
T₁ = 12° C

10 = C + 100
C = -90
now,



at time equal to t
T(t) = 70



t = 48.88 s
hence, after 48.88 s the temperature of the body will be 70°C
b) time taken to reach 98°C



t = 390 s
hence, after 390 s the temperature of the body will be 98°C