Ask question

Ask question

All categories

strojnjashka [21]

3 years ago

5

What is the answer to this problem ?

2 answers:

Over [174]3 years ago

8 0

49^(1/2) = (7^2)^(1/2) =7

Margarita [4]3 years ago

5 0

If something is to the power of 1/2, it is the same as the square root of that number. So, what's the square root of 49?

You might be interested in

What are the 1st 100 digits of Pi rounded to 100, then divided by 2?

pochemuha

35 50 65 I have to type more because it doesn’t let me answer if I don’t

7 0

3 years ago

−5(2x+1)−2x−2=<br> \,\,17<br> 17

earnstyle [38]

Answer:

here you go;

Step-by-step expl

4 0

2 years ago

How can you write 2,000 in a exponent

Mnenie [13.5K]

1,000 = 10^3 (3 because there are 3 digits after the first one)

2,000 = 2 * 10^3

3 0

3 years ago

(Pls help) I need help finding x!

Ray Of Light [21]

Answer:

x ≈ 46°

Step-by-step explanation:

Since the triangle is right use the sine ratio to solve for x

sinx = $\frac{opposite}{hypotenuse}$ = $\frac{10}{14}$ , hence

x = $sin^{-1}$ ( $\frac{10}{14}$ ) ≈ 46°

8 0

2 years ago

The latest poll from ESPN asked fans what their favorite sport was, considering pro, college and highschool levels. Out of 1000

shepuryov [24]

Answer:

Confidence interval is $0.2911$

Step-by-step explanation:

Given that 32% of fans sport is basketball as favorite sport. So total number of fans is,

$32\%\times 1000$

$= \dfrac{32}{100}\times 1000$

$=320$

So 320 fans favorite sport is basket ball.

Now find sample proportion ,

$\widehat{p}=\dfrac{number\:of\:people\:in\:the\:sample}{total\:number\:of\:people}$

Substituting the value,

$\widehat{p}=\dfrac{320}{1000}$

$\widehat{p}=0.320$

Formula for confidence interval is,

$CI=\widehat{p}\pm z\sqrt{\dfrac{\widehat{p}\left (1-\widehat{p}\right )}{n}}$

To calculate the z value.

$Confidence Level=1-\alpha$

$0.95=1-\alpha$

$0.05=\alpha$

Now divide above value by 2,

$\dfrac{0.05}{2}=\dfrac{\alpha}{2}$

$0.025=\dfrac{\alpha}{2}$

To find the value of z score calculate the area under the curve as follows

$A=\dfrac{1+CL}{2}$

$A=\dfrac{1+0.95}{2}$

$A=\dfrac{1.95}{2}$

$A=0.975$

On z table, find the value of 0.975. So the row corresponding to 0.975 is 1.9 and column corresponding to 0.975 is 0.06. Adding these two values the z score is 1.96.

or find the value from excel by using command as follows,

=NORM.S.INV(0.025)= -1.959963985

Now substituting the value,

$CI=0.320\pm 1.96\sqrt{\dfrac{0.320\left (1-0.320\right )}{1000}}$

$CI=0.320\pm 0.02891$

Lower end of the interval is,

$CI=0.320- 0.02891$

$CI=0.2911$

Upper end of the interval is,

$CI=0.320+ 0.02891$

$CI=0.3489$

Therefore 95% confidence interval is $0.2911$

7 0

3 years ago