A study was conducted and two types of engines, a and b, were compared. Fifty experiments were performed using engine a and 75 using b. The average gas mileage for a was 36 mpg, and 42 mpg for b. Assume population standard deviations for a and b are respectively 6 and 8.

Berikan satu kepentingan terhadap komposisi udara di atmosfera bumi

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.