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3 years ago

If −7∘C denotes a temperature of 7∘C below 0∘C, what does 5∘C mean Can some pls sey someting

Mathematics

2 answers:

Dafna1 [17]3 years ago

8 0

Answer:

temperature of 5° C above 0° C

Step-by-step explanation:

OLEGan [10]3 years ago

4 0

Answer:

123

Step-by-step explanation:

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If f(x) = 3x2 − 8x, 0 ≤ x ≤ 3, evaluate the Riemann sum with n = 6, taking the sample points to be right endpoints.

denis23 [38]

Split up the interval [0, 3] into 6 subintervals,

[0, 1/2], [1/2, 1], [1, 3/2], [3/2, 2], [2, 5/2], [5/2, 3]

The right endpoints are given by the arithmetic sequence,

$r_i=0+\dfrac i2=\dfrac i2$

with $1\le i\le6$ .

We approximate the integral of $f(x)$ on the interval [0, 3] by the Riemann sum,

$\displaystyle\int_0^3f(x)\,\mathrm dx=\sum_{i=1}^6f(r_i)\Delta x_i$

$\displaystyle=\frac{3-0}6\sum_{i=1}^6\left(3{r_i}^2-8r_i\right)$

$\displaystyle=\frac12\sum_{i=1}^6\left(\frac{3i^2}4-4i\right)$

$\displaystyle=\frac38\sum_{i=1}^6i^2-2\sum_{i=1}^6i$

Recall the formulas,

$\displaystyle\sum_{i=1}^ni=\frac{n(n+1)}2$

$\displaystyle\sum_{i=1}^ni^2=\frac{n(n+1)(2n+1)}6$

Then the value of the integral is approximately

$\displaystyle=\frac38\cdot\frac{6\cdot7\cdot13}6-2\cdot\frac{6\cdot7}2=\boxed{-\frac{63}8}=-7.875$

Compare to the exact value of the integral, -9.

7 0

3 years ago

WhT is the equation of a circle with a center of (-3,-6)

cluponka [151]

see screenshot

general formula is

r² = (x - x-center)² + (y - y-center)²

note that I choose a radius of 6 arbitrarily. you didn't provide the information about the radius, but just put in yours

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3 years ago

ONLY ANSWER THIS IF YOU HAVE AN EXPLANATION AND IF YOU KNOW WHAT THE ANSWER IS.

Semenov [28]

F) Tyler’s gray paint is a darker shade of gray than Hillary’s gray paint

When we take Tyler’s amount, we should do 8/30, which equals approximately .27. When we do the same thing with Hillary’s amount (10/40), we get .25. .27>.25, meaning that for the amount of white paint there is, more black paint is going into Tyler’s. As we know, black makes paint dark, so Tyler’s would be darker.

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3 years ago

Explain why 2^0 is equal to 1.

weeeeeb [17]

Answer and Step-by-step explanation:

Anything that is to the power of 0 is equal to 1. This is why 2 to the power of 0 is equal to 0.

0 is the only number such that for any number x, x + 0 = x. So, the reason that any number to the zero power is one is because any number to the zero power is just the product of no numbers at all, which is the multiplicative identity, 1.

<u><em>#teamtrees #PAW (Plant And Water)</em></u>

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3 years ago

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Pierre's company bought cement for $5.25 per bag . If they sold the cement for $7.35 per bag. What was the markup rate ?

qwelly [4]

2.15$ would be the mark up rate.

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3 years ago