Matt says that he can find the volume of the entire figure by multiplying 3x5x6. Cassie says she can find the volume by adding 30+24.Which statement is true?

#1 both are correct. there are different ways to find the volume of the figure, and both used a correct method.
#2 both are incorrect. Cassie did not find the correct volume for one of the smaller prisms, and Matt should have divide the figure into two smaller prisms.
#3 only Matt is correct.
#4 only Cassie is correct.