All categories

3 years ago

What am I doing wrong in step 5?

Mathematics

1 answer:

Norma-Jean [14]3 years ago

7 0

Step-by-step explanation:

t = 9x, and dx = 1/9 dt.

∫ sin(9x) dx

= ∫ sin(t) (1/9 dt)

= 1/9 ∫ sin(t) dt

= -1/9 cos(t)

= -1/9 cos(9x)

You might be interested in

Help me please ): I'm stuck here I don't remember how to do this .----.

inessss [21]

The last number would be 86 , TRUST ME I know these stuff!!

8 0

3 years ago

The world's smallest plane has a length of 12 feet and the world's longest plane has a length of 302 feet. Write an absolute val

iren [92.7K]

An absolute value equation which could represent the length of a plane is : 12 feets ≥ x ≤ 302 feets

Smallest length of a plane = 12 feets

Longest length of a plane = 302 feets

This means that the minimum length of a plane cannot be below 12 feets and the maximum length of a plane cannot be above 302 feets

Using x as the length of a plane :

To represent as an absolute value ; we use inequality :

Minimum length ≥ x ≤ maximum length

12 feets ≥ x ≤ 302 feets .

Learn more : brainly.com/question/18109354

8 0

3 years ago

80 points if you answer this question!

Neporo4naja [7]

Total amount of Carbon-14
$= 12 - (0.00012 \times 5000)$
$= 12 - 0.6$
$= 10.4$
=C

Full marks answer

8 0

3 years ago

Read 2 more answers

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2455 subjects randomly select

Genrish500 [490]

Answer: 0.355,0.405)

Step-by-step explanation:

Given : Significance level : $\alpha=1-0.99=0.01$

Number of subjects (n) = 2455

Number of surveys returned = 931

The probability of surveys get return will be :-

$p=\dfrac{931}{2455}=0.379226069246\approx0.38$

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\times\sqrt{\dfrac{p(1-p)}{n}}$

$0.38\pm z_{0.005}\times\sqrt{\dfrac{0.38(1-0.38)}{2455}}\\\\=0.38\pm(2.576)0.0098\\\approx0.38\pm0.025=(0.355,0.405)$

Hence, the 99% confidence interval for the proportion of returned surveys : (0.355,0.405)

5 0

3 years ago

john scored 15 points his first game. In his last game he scored 20 points. What was his percent of increase?

iVinArrow [24]

$\huge\mathrm{ \it{Answer࿐}}$

Increase = 20 - 15 = 5 points

$\boxed{ \% \: increase \: = \frac{5}{15} \times 100 }$

$\% \: \:increase = \frac{100}{3}$

$\% \: \:increase = 33.33$

_____________________________

$\mathrm{ \#TeeNForeveR}$

6 0

3 years ago