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2 years ago

Help please:)need asap

Mathematics

2 answers:

JulijaS [17]2 years ago

8 0

The predicted temperature to the nearest degree fahrenheit, at 9 p.m. is 75 degree fahrenheit.

<h3>Functions and values</h3>

Given the equation that expresses the temperature, in degrees fahrenheit, in London during a day in august as;

t(x) = 9sin(0.4x - 4) + 74,

where;

x is the number of hours after midnight.

If the time is 9pm after midnight, the total number of hours will be 21 hours

Substitute x = 21 into the function to have;

t(21) = 9sin(0.4(21) - 4) + 74

t(21) = 9sin(4.4) +74
t(21) = 9(0.0767)+74

t(21) = 74.69 degree fahrenheit,

Hence the predicted temperature to the nearest degree fahrenheit, at 9 p.m. is 75 degree fahrenheit.

Learn more on functions here: brainly.com/question/25638609

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gogolik [260]2 years ago

7 0

The predicted temperature is 75° Fahrenheit

<h3>What is trigonometric functions?</h3>

Trigonometric functions show the relationship between the sides and angles of a triangle.

Analysis:

t(x) = 9sin(0.4x - 4) + 74

since it is 9pm, which is 21 hours from 12 midnight, x = 21

t(21) = 9 sin( 0.4 x 21 - 4) + 74 = 75° Fahrenheit

In conclusion, the predicted temperature at 9pm is 75° Fahrenheit

Learn more about trigonometric functions: brainly.com/question/24349828

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The revenue, in dollars, of a company that manufactures televisions can be modeled by the polynomial 3x²+180x . The cost, in dol

tresset_1 [31]

We use the profit concept, and doing this, it is found that if 150 televisions are sold, the profit is $50,700.

-------------------------------------------

Profit is given by revenue subtracted by cost.

In this question:

Revenue: $R(x) = 3x^2 + 180x$
Cost: $C(x) = 3x^2 - 160x + 300$

Thus, the profit of selling x televisions is:

$P(x) = R(x) - C(x)$

$P(x) = 3x^2 + 180x - (3x^2 - 160x + 300)$

$P(x) = 3x^2 + 180x - 3x^2 + 160x - 300$

$P(x) = 340x - 300$

-------------------------------------------

For 150 televisions, we have P(150), so:

$P(150) = 340(150) - 300 = 50700$

If 150 televisions are sold, the profit is $50,700.

A similar question is given at brainly.com/question/14469903

8 0

3 years ago

Help!

emmasim [6.3K]

Answer:

The greatest common factor of 42, 60 and 78 is 6.

Step-by-step explanation:

The given numbers are : 42, 60 and 78

On Prime Factorization of the given terms, we get:

42 = 2 x 3 x 7

60 = 2 x 2 x 3 x 5

78 = 2 x 3 x 13

The common factors to all these three terms is 2 x 3 = 6

Hence, the greatest common factor of 42, 60 and 78 is 6.

4 0

3 years ago

The median boiling temperature of the tap water is 100°C.The median boiling temperature of the salt water is 102°C. Which statem

KiRa [710]

Answer:

The mean of the tap water boiling point is about 2 degrees Celsius less than the mean of the salt water temperature.

Step-by-step explanation:

Boiling point is the temperature at which a liquid boils or changes from liquid form to gaseous form. Water has a boiling point of 100 degrees Celsius.

Boiling point of water depends on atmospheric pressure which changes according to the height above sea level of a place.

Boiling point can also change depending on the purity of water.Water that has impurities such as salt will have a slightly higher boiling temperature.

The mean of the tap water boiling point is about 2 degrees Celsius less than the mean of the salt water temperature.

4 0

3 years ago

The median of the following data will ________________________ when you in add a data value of 1? (DO MATH on paper!) 8, 9, 9, 4

svlad2 [7]

Answer:

B decrease

Step-by-step explanation:

First, lets put the numbers in order from greatest to least.

10 9 9 8 6 4 4

Second, let's find the median without number 1. (The median is in bold.)

10 9 9 8 6 4 4

Third, let's add the number 1.

10 9 9 8 6 4 4 1

Fourth, let's find the median with the number 1.

10 9 9 8 6 4 4 1

Since there are two numbers in the middle let's find the average between them.

8+6=14

14/2= 7

Last, let's compare the two medians.

8>7

So when you add the number 1 the median decreases. So your answer is B decrease

7 0

3 years ago

Hey, mind helping me out?

maxonik [38]

Answer:

$h \leq 16$

Step-by-step explanation:

h + 4 ≤ 20

Subtract 4 from both sides.

h ≤ 20 − 4

Subtract 4 from 20 to get 16.

$h \leq 16$

Hope it helps and have a great day! =D

~sunshine~

8 0

2 years ago

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