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3 years ago

A 4 ft by 8ft rectangle has a perimeter of _ft and an area of _ ft/2

Mathematics

1 answer:

Setler [38]3 years ago

3 0

Perimeter = (4*2) + (8*2) = 8 + 16 = 24 ft
Area = 4 * 8 = 32 ft^2

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Suppose the population of a certain city is 5893 thousand. It is expected to decrease to 5218 thousand in 50 years. Find the per

leonid [27]

Answer:

% Decrease = 11.45%

Step-by-step explanation:

Original Population = 5893

Expected Population = 5218

% Decrease = Original Population - Expected Population / Original population

% Decrease = (5893 - 5218 ) / 5893

% Decrease = 675/5893

% Decrease = 0.11454268

% Decrease = 11.454268%

% Decrease = 11.45% approximately.

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3 years ago

Help me I'm in jeproady

olga nikolaevna [1]

Answer:

She subtracted 7x instead of dividing it. Personally, i wouldn't have done that. I would subtract the 14 first, then divide.

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3 years ago

Two dice are tossed. The probability that the total score is a prime number is:

andrew11 [14]

Step-by-step explanation:

50/50 it's random I think but I learned that in science

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3 years ago

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A toy maker claims his best product has an average lifespan of exactly 14 years. A skeptical quality control specialist asks for

slamgirl [31]

Answer:

interval = [17.3948 , 20.6052]

Step-by-step explanation:

given,

random sample (n) = 45

average product lifespan = 19 years

standard deviation = 4 years

confidence interval of 99 % = ?

we know,

t* = qt(1.99/2 + 44 ) = qt(0.995,44)

t* = 2.692

so,

interval

$x = 19 \pm t* \times (\dfrac{s}{\sqrt{n}})$

$x = 19 \pm 2.692 \times (\dfrac{4}{\sqrt{45}})$

$x = 19 \pm 2.692 \times 0.5963$

$x = 19 \pm 1.6052$

interval = [19 - 1.6052 , 19 + 1.6052]

interval = [17.3948 , 20.6052]

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3 years ago

Ccccc<br>ccccc<br>ccccc<br>ccccc<br>ccccc

makvit [3.9K]

Cccccccccccccccccccccccccccccccc

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2 years ago