Y is in direct proportion to x. x = 25, y = 5. Find the value of y, if x = 9.
2 answers:
Answer:
y = 1.8
Step-by-step explanation:
given y is in direct proportion to x then the equation relating them is
y = kx ← k is the constant of proportion
to find k use the condition x = 25, y = 5 , then
5 = 25k ( divide both sides by 25 )
=
= 0.2 = k
y = 0.2x ← equation of proportion
when x = 9 , then
y = 0.2 × 9 = 1.8
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Answer:
C. $538,021.66
Step-by-step explanation:
It is given that the money Seth withdraws was compounded every quarter for 35 years. So, we get,
Amount withdrawn every quarter, P = $4567
Rate of interest, r = = 0.002525
Time period, n = 35 × 4 = 140
Now, as we know the formula for annuity as,
where P = installments, PV = present value, r = rate of interest and n = time period.
This gives,
i.e.
i.e.
i.e.
i.e.
i.e.
i.e.
So, the closest answer to initial value of the account is $538,021.66
Hence, option C is correct.