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3 years ago

20 POINTS HELP DUE IN AN HOUR

Mathematics

1 answer:

muminat3 years ago

5 0

-√5 ≈ -2.23 . . . . calculator

There are many ways to describe the result of a comparison of numbers: difference, percentage difference (using either as a base), greater/less than, ratio, and more.

We'll take the simplest, and say

... -1.96312 > -√5

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A teacher has an annual income of $41,253. The income tax rate is 15%. What is the amount of the teacher's income tax in dollars

DiKsa [7]

Answer:

$6,187.95

Step-by-step explanation:

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3 years ago

Hi please can you help me this is a new topic and I’m very confused

olchik [2.2K]

Answer: the large jar is cheaper

Step-by-step explanation:

If you divide the £1.54 by 440g and £1.26 by 340g, you'll find which one is cheaper per gram :

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1.26/340 = 0.0037

So, by comparing both prices/gram, you've found that the large jar is cheaper.

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3 years ago

Kit bought a soft drink and a sandwich for 9.00 what was the price of each ifnthe sandwich cost 3.5 times as much as the soft dr

Annette [7]

Answer:

Sandwich = 6.75

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Step-by-step explanation:

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3 years ago

What is the sum of the arithmetic series? ∑[i=1,15,Fn=5i-1]

Helen [10]

$\bf \sum\limits_{i=1}^{15}\ 5i-1\implies 5\sum\limits_{i=1}^{15}\ i-\sum\limits_{i=1}^{15}\ 1\implies 5\left[ \cfrac{15(15+1)}{2} \right]-(15\cdot 1)
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5\cdot (15\cdot 8)-15\implies 585$

8 0

3 years ago

Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=x2+y2−−−−−−√

TiliK225 [7]

Parameterize the part of the sphere by

$\mathbf s(u,v)=(9\cos u\sin v,9\sin u\sin v,9\cos v)$

with $0\le u\le2\pi$ and $0\le v\le\dfrac\pi4$ . Then

$\mathrm dS=\|\mathbf s_u\times\mathbf s_v\|=81\sin v\,\mathrm du\,\mathrm dv$

So the area of $S$ (the part of the sphere above the cone) is given by

$\displaystyle\iint_S\mathrm dS=81\int_{v=0}^{v=\pi/4}\int_{u=0}^{u=2\pi}\sin v\,\mathrm du\,\mathrm dv=81(2\pi)\left(1-\dfrac1{\sqrt2}\right)=(162-81\sqrt2)\pi$

4 0

4 years ago