John earns R450 per week. He spends 3/5 of it on rent. how much does he have left?​

What is the volume of the sphere shown below with a radius of 3?

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

You can find the constant of proportionality by finding the ratio of