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Illusion [34]
3 years ago
7

One of Jimmy’s friends told him that he would save more if, instead of multiplying the amount by 3 each week, he added enough at

the end of 5 weeks to multiply the existing amount by 3. Use summation notation to write this as a sum and find the total amount he would save using this plan.
Mathematics
2 answers:
vodka [1.7K]3 years ago
6 0

Answer:

what was the initial amount?

Step-by-step explanation:

i might need more information.

Neporo4naja [7]3 years ago
6 0

Answer:

Step-by-step explanation: in each of the first five weeks of his job he wants to raise $2 to the number of weeks he has been working multiply it by three and add that amount to the savings account

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Ryan is selling a new computer system that he designed. He spent $200
Neporo4naja [7]

Answer:

Ryan should mark the price as $300.

Step-by-step explanation:

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What is the total cost of an item priced $4.95 if there is 5% sales tax?
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3 years ago
Find the derivative of the function at P 0 in the direction of A. ​f(x,y,z) = 3 e^x cos(yz)​, P0 (0, 0, 0), A = - i + 2 j + 3k
Alik [6]

The derivative of f(x,y,z) at a point p_0=(x_0,y_0,z_0) in the direction of a vector \vec a=a_x\,\vec\imath+a_y\,\vec\jmath+a_z\,\vec k is

\nabla f(x_0,y_0,z_0)\cdot\dfrac{\vec a}{\|\vec a\|}

We have

f(x,y,z)=3e^x\cos(yz)\implies\nabla f(x,y,z)=3e^x\cos(yz)\,\vec\imath-3ze^x\sin(yz)\,\vec\jmath-3ye^x\sin(yz)\,\vec k

and

\vec a=-\vec\imath+2\,\vec\jmath+3\,\vec k\implies\|\vec a\|=\sqrt{(-1)^2+2^2+3^2}=\sqrt{14}

Then the derivative at p_0 in the direction of \vec a is

3\,\vec\imath\cdot\dfrac{-\vec\imath+2\,\vec\jmath+3\,\vec k}{\sqrt{14}}=-\dfrac3{\sqrt{14}}

3 0
3 years ago
(1.438 ×10^4) - (7.11 x 10^2)
yan [13]
The answer is 13669
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3 years ago
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