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yuradex [85]
2 years ago
14

Micah was given $200 for his birthday. Each week he spends $15 on comic books. In how many weeks will his birthday

Mathematics
2 answers:
Semenov [28]2 years ago
8 0

Answer:

Step-by-step explanation:

no I belive 200 divide 15 is 13 i might be du,mb

wlad13 [49]2 years ago
5 0

Answer:

14 weeks

Step-by-step explanation:

Simply divide 200 by 15, then round up because the answer should be a full week:

200 / 15 = 13.3333 ≈ 14 weeks

For an equation, let x be weeks passed and y be money left. Since the money is spent at a constant rate, the equation will have a constant slope, and the y intercept is 200, since at no money spent, Micah has $200:

y = -15x + 200

For a ratio table, it might look something like this:

weeks  :  money

0       :      $200

1        :      $185

2       :      $160

3       :      $145

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Newton's Law of Cooling

Tf=Ts+(Ti-Ts)e^(-kt)   where Tf is temp at time t, Ts is temp of surroundings, Ti is temp of object/fluid.  So we need to find k first.

200=68+(210-68)e^(-10k)

132=142e^(-10k)

132/142=e^(-10k)

ln(132/142)=-10k

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T(t)=68+142e^(-0.0073t)  so how long until it reaches 180°?

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112=142e^(-0.0073t)

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ln(112/142)=-0.0073t

t= -ln(112/142)/(0.0073)

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kobusy [5.1K]

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Let g(x) = 2x2 - 11x. Find g(-1).<br> A) -13 Eliminate <br> B) -9 <br> C) 0 <br> D) 13
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So the answer is D) 13.


Thank you. :)

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