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alexdok [17]
3 years ago
13

Does Brainly help with Geometry?

Mathematics
2 answers:
dolphi86 [110]3 years ago
4 0

Answer:

Yes!

Step-by-step explanation:

cluponka [151]3 years ago
3 0

Answer: yeah

Explanation: yes.

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A Simple random sample of 100 8th graders at a large suburban middle school indicated that 84% of them are involved with some ty
Setler [38]

Answer: a) (0.755, 0.925)

Step-by-step explanation:

Let p be the population proportion of 8th graders are involved with some type of after school activity.

As per given , we have

n= 100

sample proportion: \hat{p}=0.84

Significance level : \alpha= 1-0.98=0.02

Critical z-value : z_{\alpha/2}=2.33  (using z-value table)

Then, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity will be :-

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

i.e. 0.84\pm (2.33)\sqrt{\dfrac{0.84(1-0.84)}{100}}

i.e. \approx0.84\pm 0.085

i.e. (0.84- 0.085,\ 0.84+ 0.085)=(0.755,\ 0.925)

Hence, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity : a) (0.755, 0.925)

3 0
3 years ago
In each of these situations light refracts, except for one. Identify the case in which light is NOT refracted.
Eva8 [605]
B) sunlight travels through space - there is nothing to bounce off of until it hits an atmophere
3 0
2 years ago
Read 2 more answers
What are the steps to solve an inequality like: |n + 8| > 3 ??????
SCORPION-xisa [38]

|n+8|>3\iff n+8>3\ \vee\ n+8-5\ \vee\ n

6 0
3 years ago
What expression represents the volume of the cylinder, in cubic units?
Nataly [62]

Answer:

2πx3

Step-by-step explanation:

7 0
2 years ago
$26,876 is invested, part at 9% and the rest at 5%. If the interest earned from the amount invested at 9% exceeds the interest e
Andre45 [30]

9514 1404 393

Answer:

  • $14,747 at 9%
  • $12,129 at 5%

Step-by-step explanation:

Let x represent the amount invested at 9%. Then the difference in interest amounts is ...

  (9%)x -(5%)(26876 -x) = 720.78 . . . . . assuming a 1-year investment

  0.14x -1343.80 = 720.78 . . . . . . . . . simplify

  0.14x = 2064.58 . . . . . . . . . . . . . . add 1343.80

  x = 14,747 . . . . . . . . . . . . . . . . divide by 0.14

$14,747 is invested at 9%; $12,129 is invested at 5%.

8 0
3 years ago
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