Witch is the closetst estimate for the product of 2×19×5

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Find the values of the variables in the kite

The tile along the edge of a triangular community pool needs to be replaced? ?