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3 years ago

The math question is in the photo!

Mathematics

2 answers:

Scorpion4ik [409]3 years ago

8 0

Answer:

everything except for C

Step-by-step explanation:

A - √2 is definitely over 1, so if you add a 4 to that, you'll get an answer over 5. (yes)

B - π is about 3.14, and since it's multiplied with 2, you'll obviously get a number greater than 5. in this case though, it'll be around 6.3. (yes)

C - √28 is a little greater than √25, so you can estimate using that. 15/5 is 3, and 5.2 - 3 is 2.2. (no)

D - √7 is around 2.7. if you divide 29 by that, you'll get an answer great than 10. (yes)

BaLLatris [955]3 years ago

7 0

A) 4+√2 is roughly equal to 5.66

B) 2 pi is roughly equal to 6.28

C) 5.2 - 15/√28 is roughly equal to -74.17

D) 29/√7 is roughly equal to 10.96

So the answers would be A, B, and D.

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NEED HELP ASAP. a sphere has a surface area of 36pi ft2. find the volume of the sphere.

max2010maxim [7]

Answer:

Approximately: 200.76π or 630.39

Step-by-step explanation:

Surface area for sphere formula: A = 4π(r^2)

36π = 4(r^2)

(36/4)π = [4(r^2)]/4

9π = r^2

28.26 = r^2 (since π equals 3.14)

√28.26 = √r^2

r ≈ 5.32

Volume for sphere formula: V = 4/3(π)(r^3)

V = 4/3(π)(5.32^3)

V ≈ 4/3(π)(150.57)

V ≈ 200.76π

V ≈ 630.39

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3 years ago

Lucy has a broken with 5 shelves there are k books on each shelf using k write an expression

Svetach [21]

STEP - BY - STEP EXPLANATION

What to find?

An expression for the total number of books.

Given:

Number of shelves = 5

Number of books in each shelf = k

If Lucy has a bookcase with 5 shelves and each of this

shelf has k books, then the total number of books can be determine by multiplying the numbers of book by the numbers of shelves.

That is;

$\begin{gathered} Total\text{ number of book=5}\times k \\ \\ =5k \end{gathered}$

ANSWER

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1 year ago

A 12-ft ladder leaning against a house makes a 64 degree angle with the ground. Will the ladder reach a window sill that is 10.5

Luba_88 [7]

Answer:

Yes, it will

Step-by-step explanation:

Given

Length of Ladder = 12 ft

Angle = 64

Required

Determine if it'll reach a height of 10.5ft from the base

See attachment for proper illustration.

From the attachment, we want to determine that x be greater than 10.5

Using sin formula:

$Sin\ 64 = \frac{x}{12}$

Multiply through by 12

$x = 12 * sin\ 64$

$x = 12 * 0.8988$

$x = 10.79$ (Approximated)

Since 10.79 is greater than 10.5, then the ladder will reach the window

sin64 = x/12

x = 12* sin64

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3 years ago

The radius of a circle is 42 inches. What is the circle's area? Use 3.14 for .

Mazyrski [523]

Answer:

A =5538.96 in^2

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

We know the radius is 42 and pi is approximated by 3.14

A = 3.14 * 42^2

A =5538.96 in^2

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3 years ago

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