Greg owns a clothing store where he designs T-shirts, t, and pairs of shorts, S.

He sells the T-shirts for $6 each and the shorts for $14. Greg can work 18

hours a day, at most. It takes him 30 minutes to design a T-shirt and an hour

and 30 minutes to design a pair of shorts. He must design at least 10 items

each day, but he cannot design more than 25 items in one day. Which set of

inequalities below represents this scenario?

O

A. S 2 10+ t, ss 25+ t, 1.55 s 36 -0.5t, s 2 0; t2 0

O

B. Ss 10-t, s 2 25- t S S 36-t s 2 0; +2 0

O

C. s 2 10-t, ss 25-t, s 2 36-t, s 2 0;12 0

D. S 2 10- tss 25 - 1, 0.5t + 1.58 < 18; s 2 0; 120

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

it takes on an electronical energy