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yKpoI14uk [10]
2 years ago
9

Find the area. 7 cm 5 cm 5 cm 22 cm 10 cm 20 cm. HELP PLEASE!!!!​

Mathematics
1 answer:
Sever21 [200]2 years ago
4 0

Answer:

770000

Step-by-step explanation:

im not sure

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The weight of an apple is 150g rounded to the nearest 5g
Gekata [30.6K]

Answer:

The weight of an apple is 150g rounded to the nearest 5g

what is the lower bound weight of the apple

what is the upper bound of the weight of the apple

Step-by-step explanation:

The weight of an apple is 150g rounded to the nearest 5g

what is the lower bound weight of the apple

what is the upper bound of the weight of the apple

7 0
3 years ago
Cory is hiking up a hill with a constant slope. The double number line shows that after Cory hikes 3 \text{ km}3 km3, start text
Andrews [41]

Answer:

The answer is "3 km ".

Step-by-step explanation:

Distance in (km): 3  \to 1

Elevation value in (m):  120 \to 40

\to \frac{3}{1} = 3 \ km \\\\\to \frac{120}{40} =\frac{12}{4} = 3 \ km

3 0
2 years ago
3
Dimas [21]

Answer:

the line perpendicular: x=-3

Step-by-step explanation:

8 0
2 years ago
When c=3 and d=7<br> 21c + 2d - |-11|d
NeX [460]

Answer:

0

Step-by-step explanation:

21(3) +2(7) - 11(7)             because the absolute value of -11 is 11

63+14-77

=0

8 0
3 years ago
A recent Gallup poll found that 36% of U.S. teens aged from 13 to 17 years old have a computer with [(6)] Internet access in the
In-s [12.5K]

Answer:

Step-by-step explanation:

a) The population parameter is the population proportion.

b) Confidence interval is written as

Sample proportion ± margin of error

Margin of error = z × √pq/n

Where

z represents the z score corresponding to the confidence level

p = sample proportion. It also means probability of success

q = probability of failure

q = 1 - p

p = x/n

Where

n represents the number of samples

x represents the number of success

From the information given,

n = 1028

p = 36/100 = 0.36

q = 1 - 0.36 = 0.64

To determine the z score, we subtract the confidence level from 100% to get α

α = 1 - 0.99 = 0.1

α/2 = 0.01/2 = 0.005

This is the area in each tail. Since we want the area in the middle, it becomes

1 - 0.05 = 0.995

The z score corresponding to the area on the z table is 2.58. Thus, confidence level of 99% is 2.58

Therefore, the 99% confidence interval is

0.36 ± 2.58 × √(0.36)(0.64)/1028

The lower limit of the confidence interval is

0.36 - 0.039 = 0.321

The upper limit of the confidence interval is

0.36 + 0.039 = 0.399

Therefore, with 99% confidence interval, the proportion of U.S. teens aged from 13 to 17 years old that have a computer with Internet access in their rooms is between 0.321 and 0.399

c) for a margin of error of 1%, that is 1/100 = 0.01, then

0.01 = 2.58 × √(0.36)(0.64)/n

0.01/2.58 = √0.2304/n

0.00387596899 = √0.2304/n

Square both sides

0.00001502314 = 0.2304/n

n = 0.2304/0.00001502314

n = 15336

5 0
3 years ago
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