Answer:
-140
Step-by-step explanation:
a₀ = 3
a₁ = 3 - 13*1 = -10
a₂ = -10 + 13*2 = 16
a₃ = 16 - 13*4 = -36
a₄ = -36 + 13*8 = 68
<u>a₅</u> = 68 - 13*16 = <u>-140</u>
* a₀=3 n is integers and n ≥ 1
aₙ = aₙ₋₁ + (-1)ⁿ * 13 * (2)ⁿ⁻¹
You can identify similar polygon by comparing their corresponding angles and sides. ( if they are the same the ratio of the lengths is the scale factor. Also check if their sides are proportional.)
Answer:
x = 135
Step-by-step explanation:
The three triangles are similar.
144/y = y/81
y^2 = 144 * 81
y = 12 * 9
y = 108
81^ + 108^2 = x^2
x^2 = 18225
x = 135
The way to solve this question is to essentially reverse the equation I used in the other answer.
I would solve this with some theoretical values. If you start with 3, how long would it take for it to triple, or reach 9.
the equation would look like 9 = 3(2)^t/6, note how the instead of 1/2 it is now 2 in the parenthesis, as it doubles every 6 hours rather than halves every amount of hours.
When placed into an algebra calculator, the answer should be about 9.5 hours
