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noname [10]
3 years ago
12

Hellen is using 3.508 grams of copper for her science experiment. How many kilograms of copper did Hellen use for her science ex

periment?
Mathematics
1 answer:
mash [69]3 years ago
7 0

Answer:

.003508 kg of copper

Step-by-step explanation:

1000 grams = 1 kg

3.508 g/1000 g = .003508 kg

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2. What is the value of 6x – 3y if x = 5 and y = 1
vesna_86 [32]

Step-by-step explanation:

x=5,y=-1

6(5)-3(-1)=30+3=33

answer G .33

4 0
3 years ago
martin is ordering dvds online. each dvd is priced at $8.50. the wedsite also charges a flat fee of $5.00 for shipping and handl
Anon25 [30]
Y=8.50x+5.00
56=y
-56=8.50x+5.00

56=8.50x+5.00
-5.00         -5.00
51=8.50x
÷8.5 ÷8.5

6=x  <u>HE CAN BUY 6 DVDS</u>
7 0
3 years ago
A wheel with radius 1 foot makes 1 revolution in 4 seconds. What is the linear velocity, in feet per second, of a point on the e
3241004551 [841]

Radius = r = 1 foot

Angular velocity = w = 1 revolutions in 4 seconds

So,

w = 0.25 revolutions per second

Since,

1 revolution = 2π radians

We can write the above equation as:

w = 0.25 x 2π radians per second = 0.5π radians per second

Linear Velocity = v = r w

Using the values, we can write:

v = 1 x 0.5π  

= 0.5 π

= π/2 feet per second

Therefore, the correct answer is option B

7 0
3 years ago
Read 2 more answers
24 students and Jamal's class are wearing tennis shoes there are 30 students in this class your mom says that 70% of this class
mel-nik [20]
Im not sure if i am understanding the question correctly... 

If you are asking if Jama's mom is correct, then no. she is wrong. this is because 

if you take the proportion,  (is/of)=(%/100) you get (x/30)=(70/100). You then solve for x which in this case would be 21 students are wearing tennis shoes.

Hope this helps. 
3 0
3 years ago
The population of the town was 25,000 people.Then 3,200 people moved away.What was the percent of increase?
german

Answer:

-12.8%

Step-by-step explanation:

To calculate the percent decrease, we:

  1. Find the difference between the new value and the original
  2. Divide the number by the original
  3. Multiply by 100 and the % symbol.

The population of the town originally had 25,000. 3,200 people moved away. This means that the new population is 21,800.

  1. 21,800-25,000=-3,200
  2. -3,200/25,000=-0.128
  3. -0.128(100)=-12.8%

The towns population decreased by 12.8%.

6 0
3 years ago
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