168k views
3 votes
M is directly proportional to r2.when r=2,m=14.Work out the value of r when m =224

User Deeps
by
8.2k points

2 Answers

4 votes

Answer:

a)504

b)8

Explanation:

a)504

b)8

User Iamruss
by
8.5k points
4 votes

♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫

M = k x r^2

Substitute in the values:

14 = k x 2^2

Divide both sides by 2^2 to find k:

k = 3.5

Substitute the new values in:

224 = 3.5 x r^2

Divide both sides by 3.5 to find r^2

r^2 = 64

Square root it:

r = 8

Hope This Helps You!

Good Luck (:

Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ

User Nightgaunt
by
8.3k points

Related questions

1 answer
5 votes
194k views
1 answer
0 votes
223k views