What is the value of c, correct to one decimal place?
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a.4.6

b. 3.2

c. 2.8

d. 1.2

Option (b) is correct.

The value of  c to one decimal place is 3.2

Step-by-step explanation:

Given : A triangle with some measurements are given.

We have to find the measure of side c.

Consider the given triangle ABC,

Using Laws of cosine,

a, b, c are the sides of a triangle and C is the angle opposite to side c.    

then,

So, Taking square root both side, we have,

Here, a = 7 ,

b = 5

and C = 24.63°          

Substitute, we have,

Simplify, we have,

c = 3.22

Thus, The value of  c to one decimal place is 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.