During the summer months, the prices of nonsmoking rooms with a king-sized bed in hotels in a certain area are roughly normally distributed with a mean of $131.80 and a standard deviation of $29.12. a travel agent randomly selects prices of nonsmoking rooms with a king-sized bed from 15 hotels in the area. what is the probability that their average cost will be more than $150

Answer:

18

Step-by-step explanation:

Edge 2021 (^Just to back up the answer above, so nobody feels doubts^.)

We have that the sides of the polygon   is mathematically given as

n=20

Option C

From the question we are told

A regular polygon has possible angles of rotational symmetry of 20°, 40°, and 80°.

How many sides does the polygon have? 10 12 18 20

Generally the equation for the Polygon exterior angle  is mathematically given as

[tex]\theta=\frac{360}{n}\\\\18=\frac{390}{18}[/tex]

n=20

OptionC

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Answer:

Step-by-step explanation:

greder

Part 1: Q is less than P.

Part 2: The density of silver (Q) is higher than that of iron (P), indicating that silver has a greater mass per unit volume, making P greater than Q.

Part 1: The value of Q is less than the value of P.

Part 2: This conclusion can be drawn by comparing the densities of the two substances, iron, and silver. Density is calculated by dividing mass by volume (D = m/V), and since the mass of iron (100g) is equal to the mass of silver (100g), we can simplify the comparison by focusing on their densities.

The density of iron (7.8 g/cm^3) is significantly less than the density of silver (19.3 g/cm^3). Density is a measure of how much mass is packed into a given volume, so the higher the density, the more mass is concentrated in a smaller space. In this case, silver is much denser than iron, which means that for an equal mass, silver occupies a smaller volume compared to iron.

Since Q represents the density of silver and P represents the density of iron, and the density of silver (Q) is greater than the density of iron (P), we can conclude that Q is indeed less than P. The higher density of silver implies that it has a greater mass concentrated in the same volume. The value of Q is less than the value of p.

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Final answer:

To find the expected number of accidents on three highways with Poisson distributions, sum the individual expectations: 0.3, 0.5, and 0.7, resulting in an expected 1.5 accidents per day.

Explanation:

The student asked how to find the expected number of accidents that will happen on any of the three highways in a day, given that the number of daily accidents on these highways are Poisson random variables with parameters 0.3, 0.5, and 0.7 respectively. To solve this, we shall sum the parameters of the Poisson distributions because the expectation of the sum of independent random variables is the sum of their expectations.

Therefore, we calculate the expected number of accidents as follows:

For the first highway with parameter 0.3, the expected number of accidents is 0.3.

For the second highway with parameter 0.5, the expected number of accidents is 0.5.

For the third highway with parameter 0.7, the expected number of accidents is 0.7.

Adding these together, we get:

Expected number = 0.3 + 0.5 + 0.7 = 1.5 accidents per day.

Final answer:

To find the number of miles Sara can drive on 12 gallons of gas, divide the total miles she drove by the total gallons of gas she used. Multiply this fuel efficiency by the number of gallons to get the result. (Option C)

Explanation:

To calculate the number of miles Sara can drive on 12 gallons of gas, we need to first find her fuel efficiency in terms of miles per gallon. To do this, we divide the total miles she drove (117 miles) by the total gallons of gas she used (5.2 gallons).

117 miles / 5.2 gallons = 22.5 miles per gallon

Next, we can use this fuel efficiency to calculate the number of miles Sara can drive on 12 gallons of gas. We multiply her fuel efficiency (22.5 miles per gallon) by the number of gallons (12 gallons).

22.5 miles per gallon * 12 gallons = 270 miles

Therefore, Sara can drive 270 miles on 12 gallons of gas.

multiply Celsius by 9/5 then add 32 to get Fahrenheit

25 * 9/5 = 45

45 +32 = 77 degrees Fahrenheit

Final answer:

To find the number when decreased by 10%, set up an equation and solve for the number.

Explanation:

When a number decreased by 10% the result in 63. What is the number?

Let the number be x.

Equation: x - 0.10x = 63

Solve for x: 0.90x = 63 => x = 63 / 0.90 = 70

Answer:

The center is at (4, -6), and the length of the radius is 5.

Step-by-step explanation:

(x − 4)2 + (y + 6)2 = 25

(x − 4)2 + (y − (-6))2 = 52

When I compare my equation with the standard form, (x − h)2 + (y − k)2 = r2, I get h = 4, k = -6, and r = 5. The center is at (4, -6), and the length of the radius is 5.

plato answer

~q → ~p that's the answer

Answer:

C. 2+_ square root 10i / 2

Step-by-step explanation:

Answer:

here are numerous information's already given in the question. Based on those information's, the answer to the question can be easily deduced.

Angle at which the plane is flying in respect to the observer = 35 degree

Altitude at which the plane is flying = 17000 feet

The distance at which the plane is flying from the observer = x 

Then

x = 17000/sin 35

 = 17000/0.57357

 = 29638.93 feet

 = 29639 feet

From the above deduction, we can conclude that the correct option among all the options given in the question is the third option.

GIVE BRainliest plz

The distance between the plane and the observer is 29,638 feet.

Data;

This is the use of SOHCAHTOA which is the relationship between sides of a right angle triangle and it's angle.

In this case, we have the value of opposite and angle and we need to find the hypothenuse.

Using sine of the angle,

[tex]sin\theta = \frac{opposite}{hypothenuse} \\sin 35 = \frac{17000}{x}\\ x = \frac{17000}{sin35}\\ x = 29,638 feet[/tex]

The distance between the plane and the observer is 29,638 feet.

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Through applying the techniques of implicit differentiation to the equation x³y² - x⁴y + 4xy³ = 0, the derivative dx/dy is found to be [x⁴ - 4y³ - 2x³y]/[3x²y² - 4x³y].

The subject of your question is implicit differentiation in calculus, a branch of mathematics. You wish to know how to differentiate the equation

x³y² - x⁴y + 4xy³ = 0

with respect to y (y is independent and x is dependent).

The initial step in implicit differentiation is to derive every term of an equation. So, we end up with:

3x²y²(dx/dy) + 2x³y(dy/dx) - 4x³y(dx/dy) - x⁴ + 4y³ + 12x²y² = 0.

After grouping like terms together, the equation become:

dx/dy[3x²y² - 4x³y] = x⁴ - 2x³y - 4y³

Eventually, divide both sides by [3x²y² - 4x³y] to isolate dx/dy and get the final answer:

dx/dy = [x⁴ - 4y³ - 2x³y]/[3x²y² - 4x³y]

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The given equation, 3.1x(2x9)=(3.1x2)x9, demonstrates the Associative Property of Multiplication. The property means that the way numbers are grouped in multiplication does not change the result.

The multiplication property shown in the equation 3.1x(2x9)=(3.1x2)x9 is referred to as the Associative Property of Multiplication. This property states that when three or more numbers are multiplied, the product does not depend on how the numbers are grouped. Therefore, (a x b) x c equals a x (b x c).

In the given equation, we can see this property applied. 3.1x(2x9) can be rearranged as (3.1x2)x9 and the results of both expressions will be the same. This demonstrates that the grouping does not affect the result of the multiplication.

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The reason that ship A is moving -35km/h is because ship B acts as an "origin" and as things move closer to the "origin" they become negative and as things move away from the "origin" they become positive.

We know that the rate of Ship A is expressed as dAdt=−35 and the rate of Ship B is expressed as dBdt=25

Step 2: We want to figure out how many km Ship A and Ship B traveled in 4 hours

ShipA:−35kmh⋅4hr=−140km

Now if we take this −140km and add it to the 150km we can see that Ship A is now only 10km away from where Ship B began

ShipB:25kmh⋅4hr=100km

This means that Ship B is now 100km from where it originally started

We can now redraw our information

Step 3: We must use the Pythagorean Theorem to find the third side of the triangle

x2+y2=z2→102+1002=z2

z=√102+1002

Step 4: Now that we know z, we must differentiate the original equation in order to find the rate at which z in changing

x2+y2=z2→2xdxdt+2ydydt=2zdzdt

We can simplify by canceling out the 2's

xdxdt+ydydt=zdzdt

Step 5: Write down all the information and then plug into equation

x=10anddxdt=−35
y=100anddydt=25
z=√102+1002anddzdt=?

Now plug in the information

xdxdt+ydydt=zdzdt

10(−35)+100(25)=√102+1002dzdt

−350+2500=√102+1002dzdt

2150=√102+1002dzdt

21.393=dzdt

The distance between the ships are increasing at a rate of 21.393 km/h

present value of annuity = annual payment * [ 1 - (1+i)^-n ]/i

=>

12500 = 128.04 * [1-(1+9%/12^-n]/9%/12

=>n = 42 payments

Present value of annuity formula yields approximately 42 payments for $12,500, with $128.04 monthly payments at 9% interest.

Let's break it down:

[tex]\[PV = Pmt \times \left[1 - \frac{{(1 + i)^{-n}}}{i}\right]\][/tex]

Where:

[tex]- \(PV\) is the present value of the annuity.\\- \(Pmt\) is the amount of each payment in the annuity.\\- \(i\) is the interest rate per period, expressed as a decimal.\\- \(n\) is the total number of payments.[/tex]

Given your values:

- [tex]\(PV\)[/tex] is $12,500.

- [tex]\(Pmt\)[/tex] is $128.04.

- [tex]\(i\)[/tex] is the monthly interest rate, which is [tex]\(9\% / 12 = 0.09 / 12\)[/tex] since the annual rate is divided by 12 for monthly payments.

- [tex]\(n\)[/tex] is what we're solving for.

Substituting these values into the formula, we have:

[tex]\[12,500 = 128.04 \times \left[1 - \frac{{(1 + 0.09/12)^{-n}}}{0.09/12}\right]\][/tex]

Now let's solve for [tex]\(n\):[/tex]

[tex]\[12,500 = 128.04 \times \left[1 - \frac{{(1 + 0.0075)^{-n}}}{0.0075}\right]\]\[1 - \frac{{(1 + 0.0075)^{-n}}}{0.0075} = \frac{{12,500}}{{128.04}}\]\[\frac{{(1 + 0.0075)^{-n}}}{0.0075} = 1 - \frac{{12,500}}{{128.04}}\]\[ (1 + 0.0075)^{-n} = 0.0075 \times \left(1 - \frac{{12,500}}{{128.04}}\right)\]\[ (1 + 0.0075)^{-n} = 0.0075 \times \left(1 - \frac{{12,500}}{{128.04}}\right)\]\[ (1 + 0.0075)^{-n} = 0.9920\]Taking the natural logarithm of both sides:\[ -n \ln(1 + 0.0075) = \ln(0.9920)\][/tex]

Using a calculator:

n ≈ [tex]\frac{{-0.008025}}{{-0.007472}}\][/tex]

n ≈ [tex]41.961\][/tex]

So, rounding up, we get , n ≈ 42

Therefore, it would take approximately 42 payments to reach a present value of $12,500 given the annuity with an annual interest rate of 9% compounded monthly and a payment of $128.04 per month.