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notsponge [240]

3 years ago

11

Shayana wants to border her dining room with crown molding. If the room measures 12 feet by 15 feet, how much crown molding will

she need ? If the crown molding costs $ 3.10 per foot,what will be her total cost for the job

1 answer:

dybincka [34]3 years ago

7 0

she will need 54 ft of crown molding. and since its $3.10 per foot, $167.40 will be the total cost.

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PLEASE HELP ME this is a 7th grade math test

konstantin123 [22]

Answer:

is there a picture or something

Step-by-step explanation:

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3 0

2 years ago

Which are the roots of the quadratic function f(b) = 62 – 75? Select two options.

elena55 [62]

Answer:

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

Step-by-step explanation:

Given

$f(b) = b^2 - 75$

Required

Determine the roots

To get the root of the function, then f(b) must be 0;

i.e. f(b) = 0

So, the expression becomes

$0 = b^2 - 75$

Add 75 to both sides

$75 + 0 = b^2 - 75 + 75$

$75 = b^2$

Take square roots of both sides

$\sqrt{75} = \sqrt{b^2}$

$\sqrt{75} = b$

Reorder

$b = \sqrt{75}$

Expand 75 as a product of 25 and 3

$b = \sqrt{25*3}$

Split the expression

$b = \sqrt{25} *\sqrt{3}$

$b = \±5 *\sqrt{3}$

$b = \±5 \sqrt{3}$

$b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

The options are not clear enough; however the roots of the equation are $b = 5 \sqrt{3} \ or\ b = -5 \sqrt{3}$

4 0

3 years ago

Find the surface area S of the following cylinder.

Tanya [424]

Answer:

384π

Step-by-step explanation:

From the diagram,

Diameter ( d ) = 16

Height ( h ) = 16

To find : Surface area of Cylinder = ?

Radius ( r ) = ?

Formula : -

r = d / 2

r = 16 / 2

r = 8

Formula : -

Surface area of Cylinder = 2πr ( r + h )

Surface area of Cylinder = 2πr ( r + h )

= 2π x 8 ( 8 + 16 )

= 16π x 24

Surface area of Cylinder = 384π

4 0

3 years ago

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Paladinen [302]

4:1,

there are 4 cups of water for every 1 cup of sugar

5 0

3 years ago

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Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

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It will take her 20 days

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