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3 years ago

15 POINTS! Will give brainliest to correct answer. I would love an explanation so I can do it on my own next time.

Mathematics

1 answer:

ira [324]3 years ago

7 0

Answer:

Step-by-step explanation:

(A). A 90° counterclockwise rotation about the origin followed by a translation 1 unit to the left.

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The circumference of a sphere was measured to be 74 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the ma

larisa86 [58]

Answer Step-by-step explanation:

Circumference of sphere=74 cm

Error=0.5 cm

a.We know that circumference of sphere= $C=2\pi r$

Using the formula

$74=2\pi r$

$r=\frac{74}{2\pi}=\frac{37}{\pi}$

$C=2\pi r$

Differentiate w.r.t r

$\frac{dC}{dr}=2\pi$

$dC=2\pi dr$

$dr=\frac{dC}{2\pi}=\frac{0.5}{2\pi}$

Surface area of sphere= $S=4\pi r^2$

Maximum area in the surface area= $dS=8\pi rdr$

$dS=8\pi\times \frac{37}{\pi}\times \frac{0.5}{2\pi}=23.5\approx 24 cm^2$

Hence,the maximum area in the surface area=24 square cm

Relative error= $\frac{\Delta S}{S}\approx \frac{dS}{S}$

$\frac{\Delta S}{S}=\frac{8\pi rdr}{4\pi r^2}=2\frac{dr}{r}=2\times \frac{\frac{0.5}{2\pi}}{\frac{37}{\pi}}=2\times \frac{0.5}{2\pi}\times \frac{\pi}{37}=0.014$

Hence, the relative error=0.014

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3 years ago

24 days out of 36 days

Alona [7]

( EDITED TO BE NOT KNOWN )

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3 years ago

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(*Who give correct answer will get branliest*)The cost price of 20 articles is the same as the selling price of X articles.If th

gtnhenbr [62]

Answer:

x=16

Step-by-step explanation:

Let C.P. of each article be Re. 1 C.P. of x articles = Rs. x

S.P. of x articles = Rs. 20

Profit = Rs. (20 - x)

∴20−xx×100=25

⇒ 2000−100x=25x

125x=2000

⇒ x=16

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3 years ago

What percent of 130 is 182

soldier1979 [14.2K]

130/182*100= 71.42% would be your answer

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4 years ago

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12 stamps increased by 125% what is the new amount

GREYUIT [131]

12 x 1.25 = 15

15 is the new amount

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3 years ago