3 years ago

Perpendicular to x = 3Passes through (-3,-1)

Mathematics

1 answer:

fiasKO [112]3 years ago

6 0

Answer:

The answer in the media.Good luck!

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Answer:

Around 82%

Step-by-step explanation:

95/115

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2 years ago

A small metal bar, whose initial temperature was 10° C, is dropped into a large container of boiling water. How long will it tak

IgorC [24]

Answer

According to newton law of cooling

$\dfrac{d T}{dt} = k (T - T_a)$

and

$T = Ce^{kt} + T_a$

now At Ta = 100

T₀ = 10 °C

T₁ = 12° C

$T(0) = Ce^{0} + T_a$

10 = C + 100

C = -90

now,

$12 = -90e^k + 100$

$e^k = \dfrac{88}{90}$

$k = ln{\dfrac{88}{90}}$

at time equal to t

T(t) = 70

$T(t) = -90 (\dfrac{88}{90})^t + 100$

$70 = -90(\dfrac{88}{90})^t + 100$

$(\dfrac{88}{90})^t = \dfrac{1}{3}$

$t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{3})$

t = 48.88 s

hence, after 48.88 s the temperature of the body will be 70°C

b) time taken to reach 98°C

$T(t) = -90 (\dfrac{88}{90})^t + 100$

$98 = -90(\dfrac{88}{90})^t + 100$

$(\dfrac{88}{90})^t = \dfrac{1}{45}$

$t\times ln(\dfrac{88}{90}) = ln(\dfrac{1}{45})$

t = 390 s

hence, after 390 s the temperature of the body will be 98°C

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3 years ago

Please I need answers ASAP

Vinil7 [7]

9+x / 3x = 5/6

If you look at it as a proportion, then you can "cross-multiply" it"

(9+x) · 6 = 3x · 5

54 + 6x = 15x

Subtract 6x from each side:

54 = 9x

Divide each side by 9 :

6 = x

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3 years ago

Besides the 90° angle measure, what are the other two angle measures of a right triangle with side lengths 5, 12, and 13? Round

stira [4]

Answer:

23 and 67

Step-by-step explanation:

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4 years ago

Read 2 more answers

Please Help Me with this problem

Alex Ar [27]

Answer:

AEB =305° as stated below

Step-by-step explanation:

AEB is the larger area starting A to EB and missing out the small AB area

EC = 180° = supplementary we label 87° angle to P.

P+ BCD = 87, + 38 = 125°

ABCD = 180°

180 - BCD = 180-125°

AB = 55°

Therefore AEB = 360-55=305°

3 0

3 years ago

Perpendicular to x = 3Passes through (-3,-1)​

Perpendicular to x = 3Passes through (-3,-1)