Rina walked 3 upon 7 km on monday and 2 upon 5 km on tuesday. how many kilometres did rina walk on the two days?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

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