A united states presidential coin is made from an alloy of 4 metals-copper, zinc, manganese, and nickel- with weights in the rat
io of 177:12:7:4 respectively. The coin weighs a total of 8 grams. What is the weight of the zinc in this coin?
1 answer:
Answer:
0.32 grams
Step-by-step explanation:
ratio of weight of -copper, zinc, manganese, and nickel = 177:12:7:4
let the
weight of copper = 177x
weight of zinc = 12x
weight of manganese = 7x
weight of nickel = 4x
Total weight of this alloy in terms of x = 177x + 12x+ 7x + 4x = 300x
given weight of alloy = 8 grams
thus,
weight of this alloy in terms of x =given weight of alloy
300x = 8 grams
x = 8/300 grams =
weight of zinc = 12x = 12 * 8/300 grams = 96/300 grams = 0.32 grams
You might be interested in
Answer:
x5-2x3+2x2-8x+4
Step-by-step explanation:
multiplying them we get
x5-4x3+2x2+2x3-8x+4
= x5-2x3+2x2-8x+4
if my answer helps please mark as brainliest.
Answer:
5/36
Step-by-step explanation:
The chance of drawing a blue marble is 5/12. The chance of drawing a green marble is 4/12. You multiply the fractions to get the probability.
5/12 * 4/12 =20/144 = 5/36 simplified.
Answer:
y = -2
Step-by-step explanation:
y + 4 = 2
y = 2 - 4
y = -2
It is an inverse relationship.
There is enough food for 156*125=19500 person-days.
If the food can last (125+70)=195 days, there are
19500 person-days / (195 days)
= 100 persons
I think the answer will be C
