I need help pls I’m confused

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. if a vector that is 3 cm long represents 30 km/h, what velocity does a 5 cm long vector which is drawn using the same scale represent? a.100 km/h b.60km/h c.50km/h

Which element provides strength to the exoskeleton of clams and oysters

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.