Ask question

Ask question

All categories

4 years ago

10

Your math score on the PARCC was 68 last year and is 73 this year. What is the percent change?

2 answers:

NemiM [27]4 years ago

8 0

Answer:

i think its 13 percentStep-by-step explanation:

lubasha [3.4K]4 years ago

7 0

Answer:

1.073%

Step-by-step explanation:

final = 73

initial= 68

73 divided by 68= 1.073%

You might be interested in

Company A is trying to sell its website to Company B. As part of the sale, Company A claims that the average user of their site

Ymorist [56]

Answer:

$L = 3.975$

Step-by-step explanation:

Given

See comment for data

Required

The lower limit 94% confidence interval

First, calculate the mean

$\bar x =\frac{\sum x}{n}$

$\bar x =\frac{0.9+10+0.9+8.7+4.8+2.6+1+13.3+9.5+8.9+8.9+4.6}{12}$

$\bar x =\frac{74.1}{12}$

$\bar x =6.175$

Next, calculate the standard deviation using:

$\sigma = \sqrt{\frac{\sum(x - \bar x)^2}{n}}$

So, we have:

$\sigma = \sqrt{\frac{(0.9 - 6.175)^2 +(10- 6.175)^2 +.................+(8.9- 6.175)^2 +(4.6- 6.175)^2}{12}}$

$\sigma = \sqrt{\frac{197.2625}{12}}$

$\sigma = \sqrt{16.4385416667}$

$\sigma = 4.054$

For 94% interval, the z score is

$z = 1.88$

So, the margin of error (E) is:

$E = z * \frac{\sigma}{\sqrt n}$

$E = 1.88 * \frac{4.054}{\sqrt {12}}$

$E = 1.88 * \frac{4.054}{3.464}$

$E = 2.200$

The confidence interval of the true mean is:

$CI = (\bar x \± E)$

The lower limit (L) is:

$L = \bar x -E$

$L = 6.175 -2.200$

$L = 3.975$

and the upper limit (U) is

$U = \bar x + E$

$U = 6.175 + 2.200$

$U = 8.375$

5 0

3 years ago

Can you answer these? I don't understand this part either. Thanks

Flura [38]

$9x+10=12x-11$
We put 12x on the left side and 10 on right side
$9x-12x=-11-10$
Now we add x and free numbers
$-3x=-21$
And our result is:
$x=7$

$3(x-8)=5x+7$
$3x-24=5x+7$
$3x-5x=7+24$
$-2x=31$
$x=- \frac{31}{2}$

3 0

4 years ago

Read 2 more answers

PLEASE HELP I WILL MARK BRAINLIEST

Mice21 [21]

Answer:

180 i think if you are not sure with my ans then just don't use it k bey

Step-by-step explanation:

7 0

3 years ago

Mrs. mott called two companies about getting new uniforms for the soccer team. The first company she called charges $70 per unif

mixer [17]

The correct answer is yes

3 0

3 years ago

HELLLLLLLLLLLLLLLLLLLLPPPPPPPPPPP ASAP Explain how to estimate the product of 12 3/8 x 6 7/8. Use complete sentences in your ans

Pavel [41]

Answer: Is 72 21/64

Multiply 12 times 6 that's 72. Then multiply 3 times 7 and 21. And then multiply 8 times 8 and get 64.

8 0

3 years ago

Read 2 more answers