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Setler [38]
3 years ago
15

Find the surface area and volume

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
8 0

Answer:

Volume - 16320

Surface Area - 480m

Step-by-step explanation:

For volume you multiply all the numbers and for surface area you add.

(the surface area might not be accurate so sorry about that)

Have a nice day hope this helps!

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20 points!
liraira [26]

Answer:

A is the answer you are looking for

4 0
3 years ago
Which of the following expressions represents “the quotient of nine times a number and seven ?
blsea [12.9K]

Answer:

9n÷7

Step-by-step explanation:

A quotient means a ratio or one quantity being divided by another, or in algebraic terms (a/b). In this case, the first quantity is "nine times a number" represented in terms of n as (n). The other quantity is just the number 7.

Dividing the 9 times n by 9 gives us the following:

9n÷7

<u><em>Hope this helps :></em></u>

7 0
3 years ago
Please someone help me to prove this. ​
morpeh [17]

Answer:  see proof below

<u>Step-by-step explanation:</u>

Use the Double Angle Identity: sin 2Ф = 2sinФ · cosФ

Use the Sum/Difference Identities:

sin(α + β) = sinα · cosβ + cosα · sinβ

cos(α - β) = cosα · cosβ + sinα · sinβ

Use the Unit circle to evaluate: sin45 = cos45 = √2/2

Use the Double Angle Identities:   sin2Ф = 2sinФ · cosФ

Use the Pythagorean Identity: cos²Ф + sin²Ф = 1

<u />

<u>Proof LHS → RHS</u>

LHS:                                  2sin(45 + 2A) · cos(45 - 2A)

Sum/Difference: 2 (sin45·cos2A + cos45·sin2A) (cos45·cos2A + sin45·sin2A)

Unit Circle:    2[(√2/2)cos2A + (√2/2)sin2A][(√2/2)cos2A +(√2/2)·sin2A)]  

Expand:        2[(1/2)cos²2A  + cos2A·sin2A + (1/2)sin²2A]

Distribute:              cos²2A   + 2cos2A·sin2A + sin²2A  

Pythagorean Identity:    1 + 2cos2A·sin2A

Double Angle:                1 + sin4A

LHS = RHS:  1 + sin4A = 1 + sin4A   \checkmark

6 0
3 years ago
Find each rate and unit rate 420 miles in 7 hours
Anon25 [30]

the unit rate is 60 mph

4 0
3 years ago
draw and shade a figure that represents 100 percent. label ur figure ''100 percent'' describe the figure in words?
Alecsey [184]
Draw a bar and shade it in all the way
4 0
3 years ago
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