Hello!
We know that the rate of change is just like speed as in the last Q so....
usually the rate of change is y/x so in this case, The Correct Answer is 100%
Option B "25".
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2.6/1.3 * 10^(9-2) = 2*10^7
Rearrange to: x^2 + 18x - 25 = 0
Then factorise (I like to do it by completing the square):
(x + 9)^2 -81 -25 = 0
(x + 9)^2 = 106
x + 9 = sqrt(106)
The sol'ns are:
x = -9 + and - sqrt(106)
we are given with 70 grams and is said that 48 grams is taken away. This is equal to 22 grams. To find the mass percentage, we divide the remaining mass and divide by the total mass. The remaining 22 grams is equal to 22/70 * 100 percent equal to 31.43 percent.
Answer:
Step-by-step explanation:
