We apply the concept of calculus here. You can determine the minimum or maximum in here if you take the derivative of a function and equate it to zero. The solution is as follows:
n = 20t² - 20t +120
dn/dt = 0 = 40t - 20 + 0
40t - 20 = 0
40t = 20
t = 20/40
t = 1/2 or 0.5
Therefore, the number of bacteria would be minimal at 0.5°C.
Answer:
A
Step-by-step explanation:
note that these are the factors of a difference of squares
• a² - b² = (a + b)(a - b), hence
(x + 13)(x - 13)= x² - 13² = x² - 169 → A
Let the first page = x
The second page would be x + 1
Add them together to equal 347
X + x + 1 = 347
Combine like terms:
2x + 1 = 347
Subtract 1 from both sides
2x = 346
Divide both sides by 2:
X = 173
The smaller page number is 173
The larger page number is 174
Answer:
Step-by-step explanation:
