A television normally sells for $320. This week, it's on sale at 60% of the normal price. What is the sale price?
2 answers:
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Answer: x = 1 ± i
Step-by-step explanation:
Solving the quadratic equation using the quadratic formula:
x = or
From the question :
a = 1
b = -2
c = 2
substituting inside the formula
X = or
x = or
x = or
Recall ; can be written as
X
, and
= i
Substituting this
x = or
simplifying, we have
x = 1 + i or 1 - i
Use the formula below.
Let A_0 = 1 because you just want to know the percentage left. Usually that's the initial amount.
t = 15, the number of years past. n = 22, the half-life.
Let A_0 = 1 because you just want to know the percentage left. Usually that's the initial amount.
t = 15, the number of years past. n = 22, the half-life.