👆🏼Calculate 20^{3}

👇🏼Triangles A and B are mathematically similar. The area of triangle A is 21cm^{2}. Calculate the area of triangle B:

👉🏼Dasha’s bedroom wall measures by . She wants to paint it. Paint costs £7.50 a can and each can covers 5m^{2}. How much will it cost Dasha to paint the wall?

👈🏼Masha put on weight this month. She weighed 75kg at the start of the month and 78kg at the end of the month. What was the percentage increase in her weight?

🖐🏼Simplify