Masha completes a journey in three stages.
In stage 1 of his journey, she drives at an
average speed of 30km/h for 45 minutes.
👆🏼How far does Masha travel in stage 1 of her
journey?

In stage 2 of her journey, Masha drives at
an average speed of 50km/h for 2 hours 48 minutes.
Altogether, over all three stages, Masha drives 200 km in 4 hours.

👇🏼What is her average speed, in km/h, in stage 3 of her journey?

🖐🏼 Simplify

👉🏼 The force, F, between two magnets is inversely proportional to the square of the distance, d, between them.
When F = 4, d = 3.
Express F in terms of d.

👈🏼 Without a calculator, estimate the value of