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3 years ago

Given that the surface area of a cube is given by the formula SA = 6s2, what is the value of SA if s = 1/2 cm.

Mathematics

2 answers:

Bess [88]3 years ago

8 0

The answer is D. (because it needs to be 20 characters)

Lunna [17]3 years ago

4 0

So the formula for the SA of the cube is 6s^2. Given this, and given what "s" is, which is 1/2, we can plug the number into the formula shown.
6(1/2)^2, which will equal 1.5 on the calculator.

So your answer will be D, 1 1/2 cm^2. Hope that helps!

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For the function given below, find a formula for the riemann sum obtained by dividing the interval [a,b] into n equal subinter

Nata [24]

We split [2, 4] into $n$ subintervals of length $\dfrac{4-2}n=\dfrac2n$ ,

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so that the right endpoints are given by the sequence

$x_i=2+\dfrac{2i}n=\dfrac{2(n+i)}n$

for $1\le i\le n$ . Then the Riemann sum approximating

$\displaystyle\int_2^42x\,\mathrm dx$

$\displaystyle\sum_{i=1}^nf(x_i)\dfrac{4-2}n=\frac8{n^2}\sum_{i=1}^n(n+i)=\frac8{n^2}\left(n^2+\frac{n(n+1)}2\right)=\frac{12n+4}n$

The integral is given exactly as $n\to\infty$ , for which we get

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To check: we have

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7 0

3 years ago

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Burka [1]

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Step-by-step explanation:

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4 years ago

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Aliun [14]

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