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scoundrel [369]

2 years ago

14

What is the surface area (in square meters) of a box with length of 3 m, width of 4 m and a height of 2 m? Round to the nearest

whole number.

1 answer:

djyliett [7]2 years ago

4 0

Answer:

C) 52

Step-by-step explanation:

= 2x 4x 3x 2x 3x 2x 4

Hope this helps!

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Frank is going to buy some ties

Fudgin [204]

Answer:

6 shirts

Step-by-step explanation:

The cost of a shirt and 2 ties is ...

$18.50 +2(7.50) = $33.50

For $205, Frank can buy $205/$33.50 = 6.12 sets of shirt and ties.

Frank can buy 6 shirts (and 12 ties) for an amount less than $205.

_____

<em>Additional comment</em>

Frank's cost will be $201 for that purchase.

3 0

2 years ago

Lanie’s room is in the shape of a parallelogram.

VladimirAG [237]

Answer:yes 108 is more than 60

Step-by-step explanation:

6 0

2 years ago

What is the value of x?

trapecia [35]

3/4 = x / 7.5
4x = 3(7.5)
4x = 22.5
x = 5.625

8 0

3 years ago

BRAINLIEST ASAP! PLEASE ANSWER!!!!!

kenny6666 [7]

Similarities: They both are polynomials of degree 2, both of their graphs is a parabola, both have either 2 or 0 real solutions, they are both continuous functions over R

<span>(DOS= difference of two squares, PST=perfect square trinomial </span>

<span>Differences: PST has three terms, whereas the difference of squares has 2. PST's factors are both the same, whereas DOS's elements are conjugates of each other. DOS can always be factored into two distinct polynomials with rational coefficients, whereas PST has two same polynomial factors.</span>

8 0

2 years ago

A recent survey based on a random sample of n=470 voters, predicted that independent candidate for the mayoral election will get

julsineya [31]

I have an expression

$\sigma = \sqrt{p(1-p)/n}$

floating around in my head; let's see if it makes sense.

The variance of binary valued random variable b that comes up 1 with probability p (so has mean p) is

$E( (b-p)^2 ) = (-p)^2(1-p) + (1-p)^2p = p(1-p)$

That's for an individual sample. For the observed average we divide by n, and for the standard deviation we take the square root:

$\sigma = \sqrt{p(1-p)/n}$

Plugging in the numbers,

$\sigma = \sqrt{.24(1-.24)/490} = 0.019 = 1.9\%$

One standard deviation of the average is almost 2% so a 27% outcome was 3/1.9 = 1.6 standard deviations from the mean, corresponding to a two sided probability of a bit bigger than 10% of happening by chance.

So this is borderline suspect; most surveys will include a two sigma margin of error, say plus or minus 4 percent here, and the results were within those bounds.

7 0

3 years ago