X has a normal distribution, such that P(X>147.0)=0.0136 and P(X<59.0)=0.0038. Use the information to calculate the probability that 80.0

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

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Simplify the following expression 48^1/2