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AllQuestion and Answers: Page 1957

Question Number 12660 Answers: 0 Comments: 0

Question Number 12699 Answers: 1 Comments: 0

A man can row a boat at 4km/hr in still water.He rows the boat 2km upstream and 2km back to his starting place in 2hours.How fast is the stream moving? please help

$$\mathrm{A}\:\mathrm{man}\:\mathrm{can}\:\mathrm{row}\:\mathrm{a}\:\mathrm{boat}\:\mathrm{at}\:\mathrm{4km}/\mathrm{hr} \\ $$$$\mathrm{in}\:\mathrm{still}\:\mathrm{water}.\mathrm{He}\:\mathrm{rows}\:\mathrm{the}\:\mathrm{boat}\:\mathrm{2km} \\ $$$$\mathrm{upstream}\:\mathrm{and}\:\mathrm{2km}\:\mathrm{back}\:\mathrm{to}\:\mathrm{his} \\ $$$$\mathrm{starting}\:\mathrm{place}\:\mathrm{in}\:\mathrm{2hours}.\mathrm{How}\:\mathrm{fast} \\ $$$$\mathrm{is}\:\mathrm{the}\:\mathrm{stream}\:\mathrm{moving}? \\ $$$$ \\ $$$$ \\ $$$$\mathrm{please}\:\mathrm{help} \\ $$

Question Number 12655 Answers: 0 Comments: 0

Question Number 12651 Answers: 1 Comments: 0

find the values of x for which ((x^3 +8)/(x^2 −4 ))is discontinuous and state each kinds of dicontinuity

$${find}\:{the}\:{values}\:{of}\:{x}\:{for}\:{which}\:\frac{{x}^{\mathrm{3}} +\mathrm{8}}{{x}^{\mathrm{2}} −\mathrm{4}\:}{is}\:{discontinuous}\:{and}\:{state}\:{each}\:{kinds}\:{of}\:{dicontinuity} \\ $$

Question Number 12649 Answers: 1 Comments: 0

Question Number 12635 Answers: 2 Comments: 0

Question Number 12632 Answers: 1 Comments: 0

y=((x^2 −4x+9)/(x^2 −4x+5)) the values of the feture set of prime numbers?

$$\boldsymbol{\mathrm{y}}=\frac{\boldsymbol{\mathrm{x}}^{\mathrm{2}} −\mathrm{4}\boldsymbol{\mathrm{x}}+\mathrm{9}}{\boldsymbol{\mathrm{x}}^{\mathrm{2}} −\mathrm{4}\boldsymbol{\mathrm{x}}+\mathrm{5}}\:\:\:\boldsymbol{\mathrm{the}}\:\:\boldsymbol{\mathrm{values}}\:\:\boldsymbol{\mathrm{of}}\:\boldsymbol{\mathrm{the}} \\ $$$$\boldsymbol{\mathrm{feture}}\:\:\boldsymbol{\mathrm{set}}\:\:\boldsymbol{\mathrm{of}}\:\:\boldsymbol{\mathrm{prime}}\:\:\boldsymbol{\mathrm{numbers}}? \\ $$

Question Number 12631 Answers: 1 Comments: 0

Find tbe sloution set of (5/((x−3)(3+x))) > 0.

$$\:\:\mathrm{Find}\:\mathrm{tbe}\:\mathrm{sloution}\:\mathrm{set}\:\mathrm{of}\:\frac{\mathrm{5}}{\left(\mathrm{x}−\mathrm{3}\right)\left(\mathrm{3}+\mathrm{x}\right)}\:>\:\mathrm{0}. \\ $$

Question Number 12630 Answers: 1 Comments: 0

f(x)=(x^ −3)^(10) lim_(h→0) ((f(2+5h)−f(2+3h))/h)=?

$${f}\left({x}\right)=\left({x}^{} −\mathrm{3}\right)^{\mathrm{10}} \\ $$$$ \\ $$$$\underset{{h}\rightarrow\mathrm{0}} {\mathrm{lim}}\frac{{f}\left(\mathrm{2}+\mathrm{5}{h}\right)−{f}\left(\mathrm{2}+\mathrm{3}{h}\right)}{{h}}=? \\ $$

Question Number 12628 Answers: 2 Comments: 0

Question Number 12626 Answers: 1 Comments: 1

2cos^2 𝛂−3sin𝛂 Find the best metaphore

$$\mathrm{2}\boldsymbol{\mathrm{cos}}^{\mathrm{2}} \boldsymbol{\alpha}−\mathrm{3}\boldsymbol{\mathrm{sin}\alpha} \\ $$$$\boldsymbol{\mathrm{Find}}\:\:\boldsymbol{\mathrm{the}}\:\:\boldsymbol{\mathrm{best}}\:\:\boldsymbol{\mathrm{metaphore}} \\ $$

Question Number 12623 Answers: 1 Comments: 1

Question Number 12621 Answers: 0 Comments: 1

Question Number 12620 Answers: 0 Comments: 1

𝛂x^2 +bx+c. y(1)=𝛂+b+c=3 max y(−1)=𝛂−b+c=0 min. y(5)=25𝛂+5b+c=?????

$$\boldsymbol{\alpha\mathrm{x}}^{\mathrm{2}} +\boldsymbol{\mathrm{bx}}+\boldsymbol{\mathrm{c}}. \\ $$$$\boldsymbol{\mathrm{y}}\left(\mathrm{1}\right)=\boldsymbol{\alpha}+\boldsymbol{\mathrm{b}}+\boldsymbol{\mathrm{c}}=\mathrm{3}\:\:\boldsymbol{\mathrm{max}} \\ $$$$\boldsymbol{\mathrm{y}}\left(−\mathrm{1}\right)=\boldsymbol{\alpha}−\boldsymbol{\mathrm{b}}+\boldsymbol{\mathrm{c}}=\mathrm{0}\:\:\boldsymbol{\mathrm{min}}. \\ $$$$\boldsymbol{\mathrm{y}}\left(\mathrm{5}\right)=\mathrm{25}\boldsymbol{\alpha}+\mathrm{5}\boldsymbol{\mathrm{b}}+\boldsymbol{\mathrm{c}}=????? \\ $$

Question Number 12619 Answers: 0 Comments: 1

𝛂x^2 +bx+c. y(8)=64𝛂+8b+c=0. max y(6)=36𝛂+6b+c=−12 min (√(𝛂+b+c))=???

Question Number 12613 Answers: 1 Comments: 0

Question Number 12612 Answers: 1 Comments: 0

Use Newtown Raphson method to find aproximate value of X=(√(((7/(x+1))))) ,starting with x_0 =2. perform 4 iteration and all iteration should be presented in 4 decimal places

$$\mathrm{Use}\:\mathrm{Newtown}\:\mathrm{Raphson}\:\mathrm{method}\:\mathrm{to}\:\mathrm{find}\:\mathrm{aproximate} \\ $$$$\mathrm{value}\:\mathrm{of}\:\:\boldsymbol{{X}}=\sqrt{\left(\frac{\mathrm{7}}{\boldsymbol{{x}}+\mathrm{1}}\right)}\:,\mathrm{starting}\:\mathrm{with}\:\boldsymbol{{x}}_{\mathrm{0}} =\mathrm{2}. \\ $$$$\boldsymbol{{perform}}\:\mathrm{4}\:\boldsymbol{{iteration}}\:\boldsymbol{{and}}\:\boldsymbol{{all}}\:\boldsymbol{{iteration}}\: \\ $$$$\boldsymbol{{should}}\:\boldsymbol{{be}}\:\boldsymbol{{presented}}\:\boldsymbol{{in}}\:\mathrm{4}\:\boldsymbol{{decimal}}\:\boldsymbol{{places}} \\ $$

Question Number 12611 Answers: 1 Comments: 0

A drum of mass 100g is rolled into the deck of a lorry 1.5m above a horizontal floor using a plank 4m long. calculate the workdone against gravity during the process. (g = 10m/s^2 ).

$$\mathrm{A}\:\mathrm{drum}\:\mathrm{of}\:\mathrm{mass}\:\mathrm{100g}\:\mathrm{is}\:\mathrm{rolled}\:\mathrm{into}\:\mathrm{the}\:\mathrm{deck}\:\mathrm{of}\:\mathrm{a}\:\mathrm{lorry}\:\mathrm{1}.\mathrm{5m}\:\mathrm{above}\:\mathrm{a}\: \\ $$$$\mathrm{horizontal}\:\mathrm{floor}\:\mathrm{using}\:\mathrm{a}\:\mathrm{plank}\:\mathrm{4m}\:\mathrm{long}.\:\mathrm{calculate}\:\mathrm{the}\:\mathrm{workdone}\:\mathrm{against} \\ $$$$\mathrm{gravity}\:\mathrm{during}\:\mathrm{the}\:\mathrm{process}.\:\left(\mathrm{g}\:=\:\mathrm{10m}/\mathrm{s}^{\mathrm{2}} \right). \\ $$

Question Number 12610 Answers: 1 Comments: 0

A steam engine of efficiency 50% burns a 1g of coal to produce 10000J of energy. if it burns 20g per sec, calculate the output power.

$$\mathrm{A}\:\mathrm{steam}\:\mathrm{engine}\:\mathrm{of}\:\mathrm{efficiency}\:\mathrm{50\%}\:\mathrm{burns}\:\mathrm{a}\:\mathrm{1g}\:\mathrm{of}\:\mathrm{coal}\:\mathrm{to}\:\mathrm{produce}\:\mathrm{10000J} \\ $$$$\mathrm{of}\:\mathrm{energy}.\:\mathrm{if}\:\mathrm{it}\:\mathrm{burns}\:\mathrm{20g}\:\mathrm{per}\:\mathrm{sec},\:\mathrm{calculate}\:\mathrm{the}\:\mathrm{output}\:\mathrm{power}. \\ $$

Question Number 12605 Answers: 1 Comments: 0

Question Number 12603 Answers: 1 Comments: 0

Q. value of θ = tan 3/4.

$${Q}.\:\mathrm{value}\:\mathrm{of}\:\:\theta\:=\:\mathrm{tan}\:\mathrm{3}/\mathrm{4}. \\ $$

Question Number 12601 Answers: 2 Comments: 0

y=(x^3 /3)+2x^2 −5x+7 find the critical points of the function

$$\boldsymbol{\mathrm{y}}=\frac{\boldsymbol{\mathrm{x}}^{\mathrm{3}} }{\mathrm{3}}+\mathrm{2}\boldsymbol{\mathrm{x}}^{\mathrm{2}} −\mathrm{5}\boldsymbol{\mathrm{x}}+\mathrm{7}\:\:\boldsymbol{\mathrm{find}}\:\:\boldsymbol{\mathrm{the}} \\ $$$$\boldsymbol{\mathrm{critical}}\:\:\boldsymbol{\mathrm{points}}\:\:\boldsymbol{\mathrm{of}}\:\:\boldsymbol{\mathrm{the}}\:\:\boldsymbol{\mathrm{function}} \\ $$

Question Number 12596 Answers: 1 Comments: 0

y=−x^2 +bx+c x=−1 point function accepts a maximum value equal to 5. Find y(1).

Question Number 12591 Answers: 0 Comments: 1

This ∮(x)=3−(x^2 /(x^4 +3x^2 +1)) find the sphere of function values

$$\boldsymbol{\mathrm{This}} \\ $$$$\oint\left(\boldsymbol{\mathrm{x}}\right)=\mathrm{3}−\frac{\boldsymbol{\mathrm{x}}^{\mathrm{2}} }{\boldsymbol{\mathrm{x}}^{\mathrm{4}} +\mathrm{3}\boldsymbol{\mathrm{x}}^{\mathrm{2}} +\mathrm{1}}\:\:\boldsymbol{\mathrm{find}}\:\:\boldsymbol{\mathrm{the}} \\ $$$$\boldsymbol{\mathrm{sphere}}\:\:\boldsymbol{\mathrm{of}}\:\:\boldsymbol{\mathrm{function}}\:\:\boldsymbol{\mathrm{values}} \\ $$

Question Number 12590 Answers: 0 Comments: 0

In a basic version of pocker , each players is dealth 5 cards from a standard 52 cards (no pocker). How many diferent 5 cards pocker hand are there ???

$$\mathrm{In}\:\mathrm{a}\:\mathrm{basic}\:\mathrm{version}\:\mathrm{of}\:\mathrm{pocker}\:,\:\mathrm{each}\:\mathrm{players}\:\mathrm{is}\:\mathrm{dealth}\:\mathrm{5}\:\mathrm{cards}\:\mathrm{from}\:\mathrm{a}\:\mathrm{standard} \\ $$$$\mathrm{52}\:\mathrm{cards}\:\left(\mathrm{no}\:\mathrm{pocker}\right).\:\mathrm{How}\:\mathrm{many}\:\mathrm{diferent}\:\mathrm{5}\:\mathrm{cards}\:\mathrm{pocker}\:\mathrm{hand}\:\mathrm{are}\:\mathrm{there}\:??? \\ $$

Question Number 12580 Answers: 1 Comments: 0

Find the smaillest value of the sum x(x+1)(x+2)(x+3).

$$\boldsymbol{\mathrm{Find}}\:\:\boldsymbol{\mathrm{the}}\:\:\boldsymbol{\mathrm{smaillest}}\:\:\boldsymbol{\mathrm{value}}\:\:\boldsymbol{\mathrm{of}}\:\:\boldsymbol{\mathrm{the}} \\ $$$$\boldsymbol{\mathrm{sum}} \\ $$$$\boldsymbol{\mathrm{x}}\left(\boldsymbol{\mathrm{x}}+\mathrm{1}\right)\left(\boldsymbol{\mathrm{x}}+\mathrm{2}\right)\left(\boldsymbol{\mathrm{x}}+\mathrm{3}\right). \\ $$

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