Question

Mis directly proportional to r³ When r = 4, M = 160 a) Work out the value of M when r = 2.

Answer 1

Я англійську погано ззнаю

Покрокове пояснення:

Поняв?

Answer 2

If $M$ is directly proportional to $r^3$, we can express this relationship as:

$M = k \times r^3$

where $k$ is the constant of proportionality.

Given that $M = 160$ when $r = 4$, we can plug these values into the equation to solve for $k$:

$160 = k \times 4^3$ $160 = k \times 64$ $k = \frac{160}{64}$ $k = 2.5$

Now that we have the value of $k$, we can use it to find $M$ when $r = 2$:

$M = 2.5 \times 2^3$ $M = 2.5 \times 8$ $M = 20$

Therefore, when $r = 2$, $M = 20$.