Find such c that point (4,3) is on line y=4x-c

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

2.5 milligrams is equivalent to how many grams