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andriy [413]
3 years ago
5

Membership in an art club is expected to grow by about 4% per month. Currently, there are 350 members in the club. In about how

many months will membership reach 500 members?
A. 9 months
B. 12 months
C.14 months
D.20 months
Mathematics
2 answers:
igomit [66]3 years ago
6 0
500=350(1+0.04/12)^12x
Solve for x
500/350=(1+0.04/12)^12x
X=(Log(500/350)/log(1+0.04/12))/12
X=9 months
Fiesta28 [93]3 years ago
4 0

Answer:

A. 9 months

Step-by-step explanation:

We are given that,

Initial members in the club = 350

Rate of growth of the members = 4% = 0.04

<em>Since, the exponential growth function is given by y=a(1+r)^x, where a= initial value and r= rate of increase and x= time.</em>

Substituting the values, we have,

Number of increase in the members after 'x' months is,

y=350(1+0.04)^x\\\\y=350(1.04)^x

Now, the number of months when the number of members is 500 is,

y=350(1.04)^x\\\\500=350(1.04)^x\\\\1.43=(1.04)^x\\\\\log 1.43=x\log 1.04\\\\x=\frac{\log 1.43}{\log 1.04}\\\\x=\frac{0.155}{0.017}\\\\x=9

<h3>That is, after 9 months, the number of members will be 500.</h3>

So, option A is correct.

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