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
<u>Given</u>:
Given that Jasmine rides her bike 9 miles in 50 minutes.
We need to determine the speed per hour.
<u>Time per hour:</u>
The time taken is 50 minutes. We need to convert minutes into hours.
Thus, we have;

Thus, the time taken to cover 9 miles is 
<u>Speed:</u>
The speed can be determined using the formula,

Substituting the values, we have;

Simplifying, we get;



Thus, Jasmine's speed is 10.8 miles per hour.
7.30×1.63=11.899
You only need 2 significant numbers because 7.30 only has 2, the 0 past the decimal without a number doesn't count.
The answer is 12
Answer:
9
Step-by-step explanation:
9*4 = 36
9*9 = 81
divide both by 9 and you get 4:9
Answer:
Unless you wrote it wrong, none of these are correct.
Step-by-step explanation:
5/6 = 0.8333333...
66/6 = 11