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3 years ago

Convert 5 hours to seconds

Mathematics

2 answers:

LenKa [72]3 years ago

5 0

Answer:

18000

Step-by-step explanation:

bixtya [17]3 years ago

5 0

18,00 seconds would be the answer

An hour is a unit of time equal to 60 minutes, or 3,600 seconds. A second is the base unit of time.

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Consider the function f(x)=9-x^2/x^2-4 For which intervals is f(x) positive? Check ALL that apply.

solong [7]

Answer:

a. f (x) < 0 for x ∈ (-∞ ,-3)

b. f (x) > 0 for x ∈ (-3,-2)

c. f (x) < 0 for x ∈ (-2,2)

d. f (x) > 0 for x ∈ (2,3)

e.f (x) < 0 for x ∈ (3,∞)

Step-by-step explanation:

Here, the given function is: $f(x)= \frac{9-x^2}{x^2-4}$

Now, to check for the sign of f(x) at x = k, put the value of x from the given interval.

We get:

<u>a. (-infinity, -3) </u>

put k = -4 from the given interval

We get $f(-4)= \frac{9-(-4)^2}{(-4)^2-4} = \frac{9-16}{16-4} = \frac{-7}{12}$

⇒ f (x) < 0 for x ∈ (-∞ ,-3)

b. (-3, -2)

put k = -2.5 from the given interval

We get $f(-2.5)= \frac{9-(-2.5)^2}{(-2.5)^2-4} = \frac{9-6.25}{6.25-4} = \frac{2.75}{2.25} > 0$

⇒ f (x) > 0 for x ∈ (-3,-2)

c. (-2, 2)

put k = 0 from the given interval

We get $f(0)= \frac{9-(0)^2}{(0)^2-4} = \frac{9}{-4} = -\frac{9}{4} < 0$

⇒ f (x) < 0 for x ∈ (-2,2)

d. (2, 3)

put k =2.5 from the given interval

We get $f(2.5)= \frac{9-(2.5)^2}{(2.5)^2-4} = \frac{9-6.25}{6.25-4} = \frac{2.75}{2.25} > 0$

⇒ f (x) > 0 for x ∈ (2,3)

e. (infinity, 3)

put k = 4 from the given interval

We get $f(4)= \frac{9-(4)^2}{(4)^2-4} = \frac{9-16}{16-4} = \frac{-7}{12}$

⇒ f (x) < 0 for x ∈ (3,∞)

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4 years ago

Wendy already owns 2 hair bands,and additional hair bands are priced at 1 for a dollar.How much money does Wendy need to spend o

steposvetlana [31]

Answer:

42 dollars

Step-by-step explanation:

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4 years ago

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Each month a manufacturing plant makes 14500 light bulbs. last month, a random sample of 200 bulbs found that 2.5% were defectiv

DanielleElmas [232]

Answer:

363

Step-by-step explanation:

Of 2.5% of 200 is 5 so we can scale that up to 14500 we get 362.5 and then we round it up to 363.

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3 years ago

2 Quick algebra 1 question for 50 points!

SVETLANKA909090 [29]

Yes

Direct variation because Time increases cupcakes increases and vice versa

Constant of proportionality represents the amount of time required per cupcakes

Yes we can find it

We have to check the x and y values of the ordered pairs (x,y)

If y is decreasing with respect to increase in x then it's inverse variation

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2 years ago

REFLECTION:

Law Incorporation [45]

Answer:

REFLECTION:

1.) The thing/s that I like most about our topic is/are getting to work with a more difficult aspect of numbers.

2.) The thing/s that I hate about our topic is/are dealing with the negative numbers .

3.) In doing our activity, I was able to use the number line to solve complicated problems.

Step-by-step explanation:

A cheerful teen willing to help,

stay salty,

stay positive...

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3 years ago

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