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Taya2010 [7]
3 years ago
15

Suppose a right circular cone has a fixed height 3.6 inches. Use differentials to estimate the change in the volume of the cone

if its height is kept constant but its radius is decreased from 1.3 inches to 1.27 inches. Answer with both an exact value and rounded to 2 decimal places. approximate change in volume: ≈ (include units in your work)
Mathematics
1 answer:
kupik [55]3 years ago
4 0

Answer:

dV/dt  = 0,474552 in³/units of time

dV/dt  = 0,47  in³/units of time

Step-by-step explanation:

Volume for the right circular cone:

V(c)  =  (1/3)*π*x²*h

Where  x is radius of the circular base, and h the heigt

Differentiating on both sides of the equation, keeping in mind that  h is constant, we get:

dV/dt  = (1/3)*3,6*2*x*dx/dt     (1)

Now when radius changes from 1,3 to  1,27 inches  or 0,03 in  in/units of time

dV/dt  =  (1/3)*3,6* 2*(1,3)²*dx/dt    

units  h   in    inches

  radius   in    inches

  dx/dt   in inches/units of time

Then

dV/dt  = 0,474552 in³/units of time

dV/dt  = 0,47  in³/units of time

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Step-by-step explanation:

If you consider matched parentheses to identify the contents of a "bag", the multiplier outside parentheses tells you how many bags you have. When you use the distributive property, you effectively dump all those bags on the table.

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Working as an insurance salesperson, Ilya earns a base salary and a commission on each new policy, so Ilya’s weekly income, II,
Morgarella [4.7K]

Answer:

l(n) = 80n + 520

Step-by-step explanation:

From the information given in the  question, there is a relationship between the number of new policy sold, n, and earning, I

           For 3 new policies, he earned $760

           For 5 new policies, he earned $920.

The rate of change of IIya's earning with respect to number of new policy sales is

             m = \frac{dI}{dn}

             m = \frac{920 - 760}{5 - 3}

             m = $160 / 2 policies

             m = $80 / policy

The linear equation for the relationship is;

             l(n) = mn + b

I(n) is Ilya’s weekly income which is a function of the number of new policies, n

m is the rate of change of I with respect to n

n is the number of new policies,

b is the intial function which is IIya's income when n equals zero

Recall, Ilya earns a commission of $80 for each policy sold during the week. (m = $80 per policy)

                 l(n) = 80n + b

To complete the relationship l, we need to calculate the initial value b.

For 3 new policies, he earned $760,

             760 = 80(3) + b

             760 = 240 + b

             b = 760 - 520

             b = 520

The final equation is l(n) = 80n + 520

From the final equation, we can deduce that Ilya’s weekly salary is $520 and he earns an additional $80 commission for each new policy sold.

6 0
3 years ago
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