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2 years ago

A woman bought 210 oranges for 650 she sold all of them at 3 for 20 how much profit did

Mathematics

1 answer:

inna [77]2 years ago

8 0

Answer:

750

Step-by-step explanation:

total cost = 650

total selling = 210/3 x 20 = 70 x 20 = 1400

total profit = 1400 - 650 = 750

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Question 2 The average salary for a house painter is $35,190 per year. An engineer makes on average $80,000. If you consider the

Ainat [17]

Answer:

$1,344,300

Step-by-step explanation:

The difference on a yearly basis is ...

$80,000 -35,190 = $44,810

Over 30 years, that difference adds up to ...

$44,810 × 30 = $1,344,300

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2 years ago

What is the surface area of the square pyramid represented by the net?

ipn [44]

Okay, Do you know how to find the surface area?

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2 years ago

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Solve the equation for x 1/3x - 15 = 12

Akimi4 [234]

X = 81
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3 years ago

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A circle with radius of 6cm sits inside a circle with radius of 9 cm

san4es73 [151]

Answer: area of shaded region is 141.3 cm²

Step-by-step explanation:

We would assume that the shade region is the area between both circles. The area of the shaded region is the area of the outer circle - the area of the inner circle.

The formula for determining the area of a circle is expressed as

Area = πr²

Where

r represents the radius of the circle.

π is a constant whose value is 3.14

Considering the inner circle,

Radius = 6 cm

Area = 3.14 × 6² = 113.04 cm²

Considering the outer circle,

Radius = 9 cm

Area = 3.14 × 9² = 254.34 cm²

Area of the shaded region is

254.34 - 113.04 = 141.3 cm²

5 0

3 years ago

A U.S. Travel Data Center survey of 500 adults found that 195 said they would take more vacations this year than last year. Cons

Lelechka [254]

Using the z-distribution, it is found that the 95% confidence interval for the true proportion of adults who said that they will travel more this year is (0.347, 0.433).

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

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

In which z is the z-score that has a p-value of $\frac{1+\alpha}{2}$ .

195 out of 500 people said they would take more vacations this year than last year, hence:

$n = 500, \pi = \frac{195}{500} = 0.39$

95% confidence level, hence $\alpha = 0.95$ , z is the value of Z that has a p-value of $\frac{1+0.95}{2} = 0.975$ , so $z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.39 - 1.96\sqrt{\frac{0.39(0.61)}{500}} = 0.347$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.39 + 1.96\sqrt{\frac{0.39(0.61)}{500}} = 0.433$

The 95% confidence interval for the true proportion of adults who said that they will travel more this year is (0.347, 0.433).

A similar problem is given at brainly.com/question/15850972

5 0

2 years ago