3 years ago

HELP PLEASE! I need helpppp!! :(

Mathematics

2 answers:

tresset_1 [31]3 years ago

5 0

The equation has the greatest slope!

Hopeful it’s correct! sorry i’m not a genius:)

Troyanec [42]3 years ago

3 0

A I think is correct but double check that I’m not sure

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Newton’s law of cooling states that the temperature of an object changes at a rate proportionalto the difference between the tem

Verizon [17]

Answer:

$\frac{dT}{dt} = -0.05\;min^{-1} (T-70\ºF)$

Step-by-step explanation:

Hi!

Lets call:

T = temprature of the object

T₀ = temperature of surroundings

t = time

The rate of change of T is its derivative with respecto to time. If T > T₀, the object looses heat, so T decreases. Then, being k > 0:

$\frac{dT}{dt} = -k(T-T_0) \\$

In this case T₀ = 70ºF and k = 0.05/min. Then the differential equation is:

$\frac{dT}{dt} = -0.05\;min^{-1} (T-70\ºF)$

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3 years ago

Francesca has 63 cm of ribbon. She will cut it into two pieces so that the longer piece is 15 cm longer than the shorter piece.

Pie

Answer:

Step-by-step explanation:

63-15=48

6 0

2 years ago

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2 - X<-7 (x > 9)<br><br>solve and graph<br>

NARA [144]

Use Photomath it graphs too

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3 years ago

38.Randy and Amy left school at the same time and began walking in oppo-

RideAnS [48]

Answer:

DISTANCE=RATE*TIME. THEREFORE

X=3.6*1/6+4.2*1/6 (1/6 HOUR=10 MIN)

X=.6+.7

X=1.3 KM IS HOW FAR THEY WIL BE APART AFTER 10 MINUTES.

Step-by-step explanation:

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3 years ago

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Car travels 85miles at a speed of 34mph how many minutes did the journey take?

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The journey took 150 minutes.

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2 years ago

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