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3 years ago

I need help with this

Mathematics

1 answer:

Lisa [10]3 years ago

8 0

Answer:

Step-by-step explanation:

15,580.84 rounded to the nearest 10 thousand is 20,000

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Joan had 198 dollars to spend on 9 books.After buying them she had 18 dollars. How much did each book cost?

Fed [463]

She spent 20 dollars on each book because if you subtract 18 from 198 you'll get 180 then you divide that by 9 n it leaves you with 20.

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3 years ago

Evaluate the Riemann sum for (x) = x3 − 6x, for 0 ≤ x ≤ 3 with six subintervals, taking the sample points, xi, to be the right e

DENIUS [597]

Hello,

Reminders:
$$\sum_{i=1}^{n} i= \dfrac{n(n+1)}{2}$


$
$$ \sum_{i=1}^{n} i^2= \dfrac{n(n+1)}{2}$

$
$$ \sum_{i=1}^{n} i^3= \dfrac{n^2(n+1)^2}{4} $
$

$n=6\\
x_{0}=0\\
x_{n}=3\\
\Delta= \dfrac{x_n-x_0}{n}=0.5\\

$
$x_{i} =0+\Delta*i= \frac{i}{2}$

$\sum_{i=1}^{n}\ \Delta*f(x_{i})=\sum_{i=1}^{6}\ \dfrac{i^3/8-6i}{2}$
$$= \dfrac{1}{2}\sum_{i=1}^{6} (\frac{i^3}{8} -6i)=\dfrac{1}{16}*\frac{(6*7)^2}{4}- \frac{9*7}{2}= -3.9575$

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8 0

3 years ago

Read 2 more answers

How many students do not like any of the three fruits? 16 17 19 25

alexdok [17]

Answer:

D. 25

Step-by-step explanation:

Total students = 90

Students who like at least one of the fruit:

20 + 16 + 8 + 4 + 5 + 10 + 2 = 66

Number of students do not like any of the fruits:

90 - 65 = 25

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3 years ago

Is 11/20 greater than 40% ?

erica [24]

Answer:

The answer is yes

Step-by-step explanation:

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3 years ago

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There are 400 silver dollars in two bags. If 275 are in one bag, how many are in the other bag?

xz_007 [3.2K]

If there are 400 silver dollars in all, and there are 275 in one bag, to find the amount in the other bag, just subtract:

400-275=125

There are 125 in the other bag.

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3 years ago

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