Acertain alloy contains 5.25% copper. how much copper is there in a piece weighing 200 pounds?

a. 105 pounds
b. 1050 pounds
c. 1.05 pounds
d. 10.5 pounds

One of the inventors of integrated circuits observed that the number of transistors that fit on an integrated circuit will double every 24 months. what type of relationship most appropriately models this situation?

Solve the equation x/4 - 5= -8 -27 -12 -7 12

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?