3 years ago

What happens to the volume of a sphere when its diameter is tripled?

1 answer:

8 0

V = 4/3 pi r^3

r is directly proportional to the diameter

and v is proportional to r^3

so

v is proportional to d^3

for d tripled

v is (3)^3 = 27 times original

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Simplify: (7x^2 − 8x − 4) + (−2x^2 + 3x + 5) + (5x^2 − 10x − 8)

kramer

Step 1. Simplify
7x^2 - 8x - 4 - 2x^2 + 3x + 5 + 5x^2 - 10x - 8
Step 2. Collect like terms
(7x^2 - 2x^2 + 5x^2) + (-8x + 3x - 10x) + (-4 + 5 - 8)
Step 3. Simplify

10x^2 - 15x - 7

5 0

2 years ago

I need the steps to this question.

yanalaym [24]

im not sure but maybe look up how to calculate volume of a cone.. then go from there :D

3 0

3 years ago

Samantha works in the bakery. She sells 136 loaves of bread in 8 hours. How many loaves of bread does she sell on average per ho

Korvikt [17]

Answer:

17 loaves of bread/hour

Step-by-step explanation:

136/8= 17

6 0

3 years ago

N+ 12 = -24<br><br> Help please

omeli [17]

Answer:

n = -36

Step-by-step explanation:

The answer is -36 because:

1) We first have to subtract -24 and 12 to find n

-24 - 12 = -36

This is because whenever there are two negative signs, multiply it.

Negative x Negative = Positive

We have to do, 24 + 12 which is 36. Finally, we just put the greater number's sign to the answer. 24 is greater than 12, therefore, we put a negative sign before 36.

Hope this helps!

7 0

2 years ago

A machine with velocity ratio of 5 is used to raise a load with an effort of 500N . If the machine is 80% efficient , determine

Yanka [14]

Answer:

Solutions given:

Velocity ratio V.R =5

effort =500N

efficiency =80%

magnitude of load=?

mechanical advantage [M.A ]

we have

efficiency =M.A/V.R*100%

80=M.A./5*100

80/100*5=M.A

M.A.=4

again

we have

M.A =load/effort

4=load/500

load=500*4

load=2000N

<h3><u>the magnitude of the load is 2000N</u>.</h3>

7 0

3 years ago