it would look like this: x times 7 -> 7x
Answer:
1.6
Step-by-step explanation:
The value of log 43 to the nearest tenth is <em>1</em><em>.</em><em>6</em>
Hello! The absolute value is the distance a number is from zero, which is always a positive number. The absolute value of -90 is 90. The absolute value of 13 is 13. 90 + 13 is 103. The distance between -90 and 13 is 103 units.
Answer:
Sugar will dissolve to half of it's amount in 2.41 minutes.
Step-by-step explanation:
The given question is incomplete; here is the complete question.
When the sugar is dissolved in water, the amount A that remains undissolved after t minutes satisfies the differential equation
If 25% of the sugar dissolves after 1 min, how long does it take for half of the sugar to dissolve.
The given differential equation is
In other form, dA = -kA.dt
We further integrate the equation,
lnA = -kt + c
Or
A = -----(1)
Here is a constant.
For t = 0,
Let
Therefore, equation (1) will become
A =
If sugar dissolves 25% in 1 minutes then undissolved sugar will be
100 - 25 = 75%
Now from the equation
By taking natural log on both the sides
k = 0.2877
Now we have to calculate the time to dissolve half of the sugar, that means half the sugar will be undissolved.
Form the equation,
ln(0.5) =
0.6931 = 0.2877t
t = 2.41 minutes
Total points
=44 +12 x 38
=500 points
Hope I can help u