Witch statements correctly use the properties of exponents to simplify?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

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