To answer this you can use a guess and check strategy.
Start with 5 minutes using it (25% lost) and 10 minutes charging (20% gained).
Try 7 minutes using it (35% lost) and 14 minutes charging (28%).
Next, 9 minutes (45%) and 18 minutes(36%).
10 minutes (50%) and 20 minutes (40%). This is the difference.
She used it for 10 minutes and charged it for 20 minutes.
Assuming that the cube has equal dimensions, it would be:
8 x 8 x 8 = 512 ft^3
Use the rational root theorem:
=16,
=1
The dividers of
: 1,2,4,8,16
The dividers of
: 1
Therefore, check the following rational numbers: +-
is a root of the expression, so factor out x-4
Compute
to get the rest of the equation.
Cancel the common factor:
is the final answer
Answer:
3 <_ x
Step-by-step explanation:
multiply both sides by 15
1/5 * 15 <_ x
15/5 <_ x
3 <_ x
It would be called an ecological model.
