An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 250250 engines and the mean pressure was 6.86.8 pounds/square inch (psi). Assume the population standard deviation is 0.60.6. If the valve was designed to produce a mean pressure of 6.76.7 psi, is there sufficient evidence at the 0.10.1 level that the valve performs above the specifications?

it 2

step-by-step explanation:

8^1/3=2

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.