This type of situation applies first order type of equation. In this case, the equation is ln( A0/A1) = kt when A1 is 1000, t is 1 hour. that is ln (A0/1000) = k the other condition is represented by ln (A0/3000) = 4k The two equations tell that Ao is equal to 694 strands.
Answer:
D
Step-by-step explanation:
Given
- 1(x + 7)(x - 4)
each term in the second factor is multiplied by each term in the first factor, that is
leaving the multiplier of - 1 for the time being
x(x- 4) + 7(x - 4) ← distribute both parenthesis
= x² - 4x + 7x - 28 ← collect like terms
= x² + 3x - 28
Hence
- 1(x² + 3x - 28) = - x² - 3x + 28 → D
