A=1/2 (a+b)h work out A if a=2 b=7 h=3

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

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?