Because it is normally set to only find real roots, not complex roots
if you are smart, you can use the factor function and use your head to find those roots
Answers:
- a = 8
- r = -15%
- y = 4.9 approximately
Note: your teacher may want you to type in a positive value for r
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Explanation:
The given equation y = 8(1-0.15)^t is in the form y = a(1+r)^t
We have a = 8 as the initial value, or what we start with.
r = -0.15 converts to -15%, so we have a decay of 15%
Plug in t = 3 to find the corresponding value of y
y = 8(1-0.15)^t
y = 8(1-0.15)^3
y = 8(0.85)^3
y = 8(0.614125)
y = 4.913
y = 4.9
-10/7
1) -5/7 ➗2/4
2) -5/7 • 4/2
You change the second fraction into a reciprocal, then multiply
Because they will always be divisible by 5
