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3 years ago

Can any one answer this please

Mathematics

1 answer:

Lynna [10]3 years ago

5 0

Answer: 10.6

Step-by-step explanation:

divide the number she spent (2.65) by the amount the store charges per ounce (.25)

2.65/ .25 = 10.6

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Tran wants to cut stips of paper that are 2 1/4 in wide his sheet of paper iss 11 1/2 in wide he estimates that 11 1/2 divided 2

Wittaler [7]

He is overestimating because 2.25 * 6 = 13.5, which is less than 11.5

6 0

4 years ago

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Solve 5y'' + 3y' – 2y = 0, y(0) = 0, y'(O) = 2.8 y(t) =( Preview

Karolina [17]

Answer:

$y=\frac{4}{5}e^{t}-\frac{4}{5}e^{-\frac{2}{5}t}$

Step-by-step explanation:

The given equation 5y'' + 3y' - 2y =0 can be written as

$(5D^{2}+3D-2)y(t)=0$

Solving for complementary function we have Roots of $(5D^{2}+3D-2)$ as follows

$(5D^{2}+5D-2D-2)$

$5D(D+1)-2(D+1)=0\\\\(5D-2)(D+1)=0\\\\\therefore D=-1\\D=+2/5$

Thus the complementary function becomes

y= $y=c_{1}e^{m_{1}t}+c_{2}e^{m_{2}t}$

where

$m_{1},m_{2}$ are calculated roots

thus solution becomes

$y=c_{1}e^{-t}+c_{2}e^{\frac{2}{5}t}$

Now to solve for the coefficients we use the given boundary conditions

$y(0)=0\\\\\therefore c_{1}+c_{2}=0\\\\y'(0)=-c_{1}+\frac{2}{5}c_{2}=2.8\\\\\therefore c_{2}+\frac{2}{5}c_{2}=2.8\\\\c_{2}=2\\\\\therefore c_{1}=-2}$

hence the solution becomes

$y=-2e^-{t}+2e^{\frac{2}{5}t}$

8 0

3 years ago

Note: if your not in high school don’t do the problem..

Sunny_sXe [5.5K]

2+5-(3-3)

2+5-0

7-0

hope this helps

4 0

3 years ago

Please help! / 50 points

lutik1710 [3]

Answer:

Solution given:

radius [r]=4

height [h]=5

we have

Surface area of cylinder=2πr(r+h)

=2π×4(4+5)

=<u>72πunits³ is a required volume.</u>

3 0

3 years ago

Find the total of a<br> $60 meal with 15%<br> tip and 8% tax.

sergey [27]

Answer: $73.8 15% of 60 is 9 and 8% of 60 is4.8 then if you add them all together you get 73.8$

Step-by-step explanation:

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3 years ago

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