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3 years ago

WILL MARK BRAINLIEST IF U ANSWER CORRECTLY

Mathematics

1 answer:

Alla [95]3 years ago

7 0

Answer:

265.68

Step-by-step explanation:

ok so the area for the rectangle is 228

the area for the circle is 37.68

you add them together to get your answer

hope this helps

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A researcher wants to construct a 90% confidence interval for the proportion of elementary school students in Seward County who

dezoksy [38]

Answer:

The sample size is $n =68$

Step-by-step explanation:

The population proportion is $\^ p = 0.50$

The margin of error is $E = 0.1$

From the question we are told the confidence level is 90% , hence the level of significance is

$\alpha = (100 - 90 ) \%$

=> $\alpha = 0.10$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 1.645$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )$

=> $n = [\frac{1.645 }{0.1} ]^2 * 0.50 (1 - 0.50 )$

=> $n =68$

6 0

2 years ago

9. One winter day, the temperature increased

Andru [333]

Answer: A~ 45

Step-by-step explanation:

8 0

2 years ago

Write each number in scientific notation

Sophie [7]

1. 6x10^6

2. 5.4x10^-6

3. 6x10^-1

4. 9x10^3

5. 6.7x10^1

6. 2x10^6

7. 2x10^1

8. 71,000

9. 4.89x10^4

10. 9x10^7

11. 63

11. 3.3

12. 3

13. 2.16x10^4

14. 4.2x10^3

15. 015

16. 4.8x 10^0

hope it helps!

8 0

3 years ago

Read 2 more answers

I only need #8, but if you want to do the others you can.

lutik1710 [3]

Ralphs is 7.5x+10
frank’s is 10x

7 0

3 years ago

Read 2 more answers

A can of soda in 1972 costs $0.15, by 2012 it cost $1.35 find the rate at which the cost of a can of soda increases over this ti

fenix001 [56]

Answer:

800%

Step-by-step explanation:

<h2><u>Percentage increase</u></h2><h3><u>formula:</u></h3>

change/ original * 100

change is 1.35 - 0.15 = 1.2

original is the amount in the beginning which is 0.15

= 1.2/0.15 * 100

=800 %

<em><u>the percentage increase is by 800%</u></em>

8 0

2 years ago