All categories

2 years ago

You have two spheres. Sphere a has radius ra and sphere b has radius rb = kra. What is b's volumevb intermsofva andk? Vb = va

1 answer:

5 0

$V_a=\dfrac{4}{3}\pi r_a^3\\\\V_b=\dfrac{4}{3}\pi r_b^3\\\\V_b=\dfrac{4}{3}\pi(kr_a)^3\qquad\text{substitute for $r_b$}\\\\V_b=k^3V_a$

You might be interested in

Sophia injured her leg and had to go to the doctor. She paid the bills with her credit card. What is a disadvantage of using the

lorasvet [3.4K]

The answer is c because credit cards you pay for after unlike a debit card

7 0

2 years ago

Read 2 more answers

Divide: 8.6) 3.440 short answer

ivanzaharov [21]

Answer:

well your answer will be 2.5

Step-by-step explanation:

2.5

5 0

2 years ago

Read 2 more answers

30 preschoolers are going to a field trip 60% of them will be bringing their own lunch how many lunches does the teacher need to

sweet-ann [11.9K]

Answer:They will need to make 18 lunches

Step-by-step explanation: How I did it was use the website demos scientific calculator and put the question of what is 60% of 30 and it gave the answer!

3 0

3 years ago

Read 2 more answers

Write the product in standard form. ( 7 + 7i)( 6 + 7i)

Jlenok [28]

I believe -7 + 91i. i hope this helps

5 0

2 years ago

Elimination_4x_2y=14 _10x+7y=_24

Gnesinka [82]

Answer:

The answer is $x=-\frac{50}{8}$ and $y=\frac{11}{2}.$

Step-by-step explanation:

Given:

-4x-2y=14

-10x+7y=-24

Now, to solve it by elimination:

$-4x-2y=14$ ......(1)

$-10x+7y=-24$ ......(2)

So, we multiply the equation (1) by 7 we get:

$-28x-14y=98$

And, we multiply the equation (2) by 2 we get:

$-20x+14y=-48$

Now, adding both the new equations:

$-28x-14y+(-20x+14y)=98+(-48)$

$-28x-14y-20x+14y=98-48$

$-28x-20x-14y+14y=50$

$-8x=50$

Dividing both the sides by -8 we get:

$x=-\frac{50}{8}$

Now, putting the value of $x$ in equation (1):

$-4x-2y=14$

$-4(-\frac{50}{8})-2y=14$

$\frac{200}{8} -2y=14$

$25-2y=14$

Subtracting both sides by 25 we get:

$-2y=-11$

Dividing both sides by -2 we get:

$y=\frac{11}{2}$

Therefore, the answer is $x=-\frac{50}{8}$ and $y=\frac{11}{2}.$

5 0

3 years ago