Matrices C and D are shown below.
What values of a and b will make the equation CD = I true?

Will mark brainliest! ( explain the answer too, it can be one sentence)

Describe a situation where it would be beneficial to round decimals to the nearest dollar. explain why you would use rounding in that situation.

Out of the 150 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking?