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3 years ago

I need this done by tonight I will good rating+good reward if correct

Mathematics

1 answer:

Slav-nsk [51]3 years ago

4 0

Answer:

A. biased because if people are leaving a fast food restaurant, they are more likely to eat fast food restaurants than if you were to survey them in a more random setting.

B. Representative because her eggs came from multiple sample spaces.

C. biased because the tallest corn stalk is expected to have more ears.

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Debbie bought some apples at the grocery store. The apples cost $0.89 per pound. I’d Debbie spent $2.67 on apples, then how many

egoroff_w [7]

The answer is C- 3 pounds

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3 years ago

There are eight planets in our solar system. Mars is the fourth planet from the sun. What percentage of the planets in our solar

larisa [96]

Answer:

C 37.5%

Step-by-step explanation:

There are 3 planets closer to the sun than mars

3/8 = .375

Changing to a percent

37.5% are closer to the sun than mars

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2 years ago

Need help with this please (｡ŏ﹏ŏ)

Elis [28]

A triangle always equals 180 degrees

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2 years ago

PLZ HELP ill GIVE BRAINIESt!!!!20 Points

Goryan [66]

A) √50 = 2√25 . Her mistake was that she confused the radicand (25) & the outside factor to the radicand that is 2. The write answer is 5√2 & not the opposite

b) Find 2 numbers where their square nears the lower & the upper end of 50.

For instance 7² = 49 & 8² =64 are the nearest lower & upper numbers that encompass 50
Hence we can write the following inequality:

49<50<64 & √49<√50√64 ==> 7<√50<8

So the √50 is nearer to 7² rather than 8².

Then let's try 7.1² =50.41 Which is an acceptable approximation

7 0

3 years ago

A 25-foot ladder is placed against a vertical wall. Suppose the bottom of the ladder slides away from the wall at a constant ra

dsp73

Answer: The ladder is sliding down the wall at a rate of $5\dfrac{17}{50}\ ft/sec$

Step-by-step explanation:

Since we have given that

Length of ladder = 25 foot

Distance from the wall to the bottom of ladder = 15 feet

Let base be 'x'.

Let length of wall be 'y'.

So, by pythagorus theorem, we get that

$x^2+y^2=25^2\\\\15^2+y^2+625\\\\225+y^2=625\\\\y^2=625-225\\\\y^2=400\\\\y=\sqrt{400}\\\\y=20\ feet$

$\dfrac{dy}{dx}=-4\ ft/sec$

Now, the equation would be

$x^2+y^2=625\\$

Differentiating w.r.t x, we get that

$2x\dfrac{dx}{dt}+2y.\dfrac{dy}{dt}=0\\\\2\times 15\dfrac{dx}{dt}+2\times 20\times -4=0\\\\30\dfrac{dx}{dt}-160=0\\\\\dfrac{dx}{dt}=\dfrac{160}{30}=5.34\ ft/sec$

Hence, the ladder is sliding down the wall at a rate of $5\dfrac{17}{50}\ ft/sec$

8 0

3 years ago