What is the following product?

(2 StartRoot 7 EndRoot + 3 StartRoot 6 EndRoot) (5 StartRoot 2 EndRoot + 4 StartRoot 3 EndRoot)

a. 6 StartRoot 10 EndRoot + 16 StartRoot 2 EndRoot + 42
b. 8 StartRoot 10 EndRoot + 30 StartRoot 2 EndRoot + 66
c. 7 StartRoot 14 EndRoot + 6 StartRoot 21 EndRoot + 16 StartRoot 3 EndRoot + 21 StartRoot 2 EndRoot
d. 10 StartRoot 14 EndRoot + 8 StartRoot 21 EndRoot + 30 StartRoot 3 EndRoot + 36 StartRoot 2 EndRoot

step-by-step explanation:

mean or average is 40.6

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.

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.