Ok so 6^5
6x6x6x6x6 = 7776
7776x=20
Then we divide each side by 7776
7776x = 20
——— ———
7776 7776
X= 0.00257202
Estimate: 0
f'(x) = (4 arctan(7x))'
f'(x) = 4 (arctan(7x))'
By the chain rule,
f'(x) = 4/(1 + (7x)^2) * (7x)'
f'(x) = 28/(1 + 49x^2)
and hence
f'(4) = 28/(1 + 49*16) = 28/785
In case you're not sure about the derivative of arctan: If y = arctan(x), then x = tan(y). Differentiating both sides with respect to x gives
1 = sec^2y y' = (1 + tan^2y) y' = (1 + x^2) y'
==> y' = 1/(1 + x^2)
<span> For this case we have the following decimal number:
0.8888
Since the number has 4 decimal places, then the first thing to do is multiply and divide the number by 10000.
We have then:
</span>

<span> Simplifying we have:
</span>

<span>
Answer: A fraction that represents the decimal 0.8888 is: 1111/1250</span>
Answer:
Ocean evaporation
Step-by-step explanation:
May I have brainiest