If something is a perfect cube, it is able to be put under a cube root ( $\sqrt[3]{..}$ ) and will result in an integer (a non-decimal number > 0, basically).

So let's calculate $\sqrt[3]{48}$ , and see if the result is an integer.

$\sqrt[3]{48}$ = 3.634.......

As you can see, the result is not an integer, therefore 48 is not a perfect cube.

8 0

2 years ago

A square base a side length of x+3. What is its area

zepelin [54]

Well it would be (x+3)(x+3)
using the FOIL method you end up with:
x^2 + 6x + 9

:D

6 0

3 years ago

If the speed of a car is 20 m s^-1 then what is its speed in km h^-1 ?<br>#no spam

ivanzaharov [21]

Speed in m/s=20m/s

We have to convert it to km/h

$\\ \sf\longmapsto 20\times \dfrac{3600}{1000}$

$\\ \sf\longmapsto 20\times \dfrac{18}{5}$

$\\ \sf\longmapsto 4times 18$

$\\ \sf\longmapsto 72km/h$

8 0

2 years ago

Read 2 more answers

4. $500 at 12% for 6 months​

4. $500 at 12% for 6 months