4. Mrs. James bought a tv for $999, but she received a discount of 20%. What is the price
of the tv?
A. $1798.20
B. $1198.80
C. $199.80
D. $799.20

Step-by-step explanation:

She bought the tv for 80% of the original price. Therefore the original price is higher than $999. Now you can cancel options C and D because they are smaller than $999.

so the original price of the tv is 120% of $999 is $ 1198.80

Therefore the correct option is option B

47

step-by-step explanation:

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.