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3 years ago

Scale on a map is 1:800000. motorway is 120 km long . what distance will it be on the map

Mathematics

1 answer:

Rudik [331]3 years ago

7 0

Answer:

Multiply the number of inches on the map times the scale to determine the true distance. For example, if the distance on the map was 5.5 inches and the scale was 1:6,336,000, the true distance would be 550 miles. To convert an area, convert the dimensions using the scale and then find the true area.

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The price of a television was reduced $250 to $200. By what percentage was the price of the television reduced

Lubov Fominskaja [6]

Answer:

The percentage of the price of television reduced to <u>20%</u>.

Step-by-step explanation:

Given:

The price of a television was reduced $250 to $200.

Now, to find the percentage of the reduced price of television.

So, to get the reduced amount of television:

Old price = $250.

New price = $200.

Reduced amount = $250 - $200 = $50.

Now, to get the percentage of price reduced:

$\frac{Reduced\ amount}{Old\ price} \times 100$

$=\frac{50}{250}\times 100$

$=\frac{5000}{250}$

$=20\%.$

Therefore, the percentage of the price of television reduced to 20%.

3 0

3 years ago

Things on sale at 25% off the original price which expression represents the sale price of the original price of the jeans is 40

olya-2409 [2.1K]

What is the question

8 0

3 years ago

36 out of 100 randomly selected taxpayers knew about tax incentives for installing energy-saving furnaces. Find a 90% confidence

tresset_1 [31]

Answer:

The 90% confidence interval for the population proportion who knew about the incentives is (0.28, 0.44).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 100, \pi = \frac{36}{60} = 0.6$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 - 1.645\sqrt{\frac{0.36*0.64}{100}} = 0.28$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 + 1.645\sqrt{\frac{0.36*0.64}{100}} = 0.44$

The 90% confidence interval for the population proportion who knew about the incentives is (0.28, 0.44).

7 0

3 years ago

Joey puts 25% of his allowance into savings each week. If last week he put 10$ in savings, what was his allowance last week?

GrogVix [38]

Answer:

$40

Step-by-step explanation:

25% is 1/4.

If 10 is 1/4 of the full amount, then you take 10 and multiply by 4 to get the full amount.

10 times 4 equals 40.

7 0

2 years ago

14 is the same as ?i need help

Basile [38]

Same as 7*2=14 explain more what u need

4 0

3 years ago

Scale on a map is 1:800000. motorway is 120 km long . what distance will it be on the map​

Scale on a map is 1:800000. motorway is 120 km long . what distance will it be on the map