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Aleonysh [2.5K]
2 years ago
9

Which graph represents exponential decay?

Mathematics
1 answer:
Rudiy272 years ago
4 0

Answer:

4th one

Step-by-step explanation:

The fourth one shows an exponential decay.....curved line getting smaller in value as time progresses.

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The initial number of people that are sick with the flu is 36 and growing at a rate of 8% every day. How many people will be sic
Romashka [77]
This is an example of an exponential growth problem.

 The formula for this is : y = x(1+r)^t
y = final amount
x = starting amount = 36
r = rate = 8% = 0.08
t = time = 11 days

y = 36(1+0.08)^11

y = 36 (1.08)^11
y = 36*2.3316389
y = 83.94 = 84 people


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3 years ago
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romanna [79]

Answer:

\huge\boxed{(d+7)(d-7)=d^2-49}

Step-by-step explanation:

\bold{METHOD\ 1:}\\\\(d+7)(d-7)\qquad|\text{use}\ (a+b)(a-b)=a^2-b^2\\\\=d^2-7^2=d^2-49\\\\\bold{METHOD\ 2:}\\\\(d+7)(d-7)\qquad|\text{use FOIL}\ (a+b)(c+d)=ac+ad+bc+bd\\\\=(d)(d)+(d)(-7)+(7)(d)+(7)(-7)\\\\=d^2-7d+7d-49\qquad|\text{combine like terms}\\\\=d^2+(-7d+7d)-49\\\\=d^2-49

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