What does writing a number in standard form mean in fourth grade math?

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)