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sergeinik [125]
3 years ago
9

The total number of Living humans on Earth was converted to scientific notation using an ontine calculator and was reported to b

e approximately 7.158 x10^9 Write Earth's population as a single digit times an integer power of 10 and in standard form
Mathematics
1 answer:
Amiraneli [1.4K]3 years ago
3 0
<span>7.158 x 10^9 rounds to 7 x 10^9

</span>7 x 10^9 means 7 followed by 9 zeros.

7.158 * 10^9 is approximately equal to 7 * 10^9 = 7,000,000,000
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Answer:

at least 51,569 blocks ( same as 51569)

Step-by-step explanation:

973 * 53

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Let f(x)=x^2f ( x ) = x 2. Find the Riemann sum for ff on the interval [0,2][ 0 , 2 ], using 4 subintervals of equal width and t
sladkih [1.3K]

Answer:

A_L=1.75

Step-by-step explanation:

We are given:

f(x)=x^2

interval = [a,b] = [0,2]

Since n = 4 ⇒ \Delta x = \frac{b-a}{n} = \frac{2-0}{4}=\frac{1}{2}

Riemann sum is area under the function given. And it is asked to find Riemann sum for the left endpoint.

A_L= \sum\limits^{n}_{i=1}\Delta xf(x_i) = \frac{1}{2}(0^2+(\frac{1}{2})^2+1^2+(\frac{3}{2})^2)=\frac{7}{4}=1.75

Note:

If it will be asked to find right endpoint too,

A_R=\sum\limits^{n}_{i=1}\Delta xf(x_i) =\frac{1}{2}((\frac{1}{2})^2+1^2+(\frac{3}{2})^2+2^2)=\frac{15}{4}=3.75

The average of left and right endpoint Riemann sums will give approximate result of the area under f(x)=x^2 and it can be compared with the result of integral of the same function in the interval given.

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Result are close but not same, since one is approximate and one is exact; however, by increasing sample rates (subintervals), closer result to the exact value can be found.

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3 years ago
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almond37 [142]

Answer:

32.17

Step-by-step explanation:

A= \pi × r^{2}

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A= 32.17

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Step-by-step explanation:

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