Answer:
7 minutes
Step-by-step explanation:
The scientist changes the temperature for the solution at a rate of -7°C per minute. We need to find out how long it'll take for the solution's temperature to change from 0°C to -49°C. So, we divide -7 by -49 to find out how long it will take:
-49 / -7 = 7
It will take 7 minutes for the temperature to reach -49°C.
In a 30 60 90 triangle, the short side = one half the hypotenuse = 4.5
The middle side = short side * sq root of 3
So, the middle side = 4.5 * sq root of 3 (
<span>
<span>
<span>
7.7942</span></span></span>)
Perimeter = 4.5 + 7.7942 + 9
Perimeter =
<span>
<span>
<span>
21.2942
</span>
</span>
</span>
Source:
http://www.1728.org/trig2.htm
Answer:
25%
Step-by-step explanation:
I used a proportion
18/72=×/100
Then, cross multiply
1,800=72×
Next, find the x
1,800/72=25
x=25
Solutions
<span>A right handed parabola: </span>
<span><span>
</span></span>A left handed parabola:
<span>
</span>An up facing parabola:
<span>
</span>A down facing parabola:
Answer:
1/9
Step-by-step explanation:
Of the 36 possible sums, 4 of them are 9. The probability is 4/36 = 1/9.
_____
Comment on these dice
Interestingly, the probability of any given sum is the same as it is with "normal" dice.