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2 years ago

Please answer part A and B ( Dividing fractions )

Mathematics

1 answer:

julia-pushkina [17]2 years ago

7 0

Answer:

yehwe have decided on this number

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Consider a rectangle of perimeter 12 cm. form a cylinder by revolving this rectangle about one of its edges. what dimensions of

vlada-n [284]

Answer:

Dimensions will be 4 * 2 cm.

Step-by-step explanation:

l = length of rectangle and w = width

Perimeter = 2l + 2w = 12

l + w = 6.

---> l = 6 - w

Volume of the cylinder

V = πr^2l

w = 2πr

--> r = w/2π

l = 6 - w so

V = π(w/2π)^ 2 * (6 - w)

---> V = w^2/4π (6- w)

---> V = 3w^2/ 2π - w^3/4π

Differentiating:

dV/ dw = 6w/ 2π - 3w^2 / 4π

= - 3(w - 4)w / 4π

This equals 0 for maximum volume

- 3(w - 4)w / 4π = 0

w = 0 or w = 4

8 0

1 year ago

Help me pls with this math problem

algol13

Answer:

see attached

Step-by-step explanation:

Each partial product is 47 times 5 = 235. When you write the sum, you need to pay attention to place value. (That is, 47×50 = 2350.)

Working right to left, we generally compute the partial products as ...

47 × 55 = 47 × 5 + 47 × 50 = 235 +2350

8 0

2 years ago

There are 65 students in the school band. ⅖ of the band plays the trumpet. How many students in the band play trumpet?

Sauron [17]

Answer:

Step-by-step explanation:

3 0

3 years ago

If f(x) = 3x2 - 6, find f(-1) . f(-1)=

swat32

Answer:

Step-by-step explanation:

f(-1)=3*-1^2-6

=3*1-6

=3-6

=-3

6 0

3 years ago

Which group represents equivalent ratios?

ladessa [460]

Answer:

20%, 1/5, 0.2

Step-by-step explanation:

Verify each case

case 1) we have

20%, 1/4, 0.2

we know that

$20\%=20/100=0.20$

$\frac{1}{4}=0.25$

therefore

$0.20=0.20\neq0.25$

This group not represents equivalent ratios

case 2) we have

25%, 1/4, 0.2

we know that

$25\%=25/100=0.25$

$\frac{1}{4}=0.25$

therefore

$0.25=0.25\neq0.20$

This group not represents equivalent ratios

case 3) we have

20%, 1/5, 0.2

we know that

$20\%=20/100=0.20$

$\frac{1}{5}=0.20$

therefore

$0.20=0.20=0.20$

This group represents equivalent ratios

case 4) we have

25%, 1/5, 0.2

we know that

$25\%=25/100=0.25$

$\frac{1}{5}=0.20$

therefore

$0.25\neq0.20=0.20$

This group not represents equivalent ratios

3 0

3 years ago