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taurus [48]
3 years ago
15

To test the purity of the hydrazine, the chemist collected a sample 1/2000th the volume of the batch produced. If the sample siz

e was 0.4 liters, what was the volume of the production batch?
Mathematics
1 answer:
Bad White [126]3 years ago
3 0

If 0.4 liters is 1/2000 of the production batch, then the production batch is 2000 * 0.4 liters

2000 * 0.4 liters = 800 liters

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15 cm<br> 4 cm<br> cm<br> V=____cm3
bonufazy [111]

Answer:

V=(πr^2 x h)/3

lets use π as 3.14 cause I dont know what pi u using

3.14 x 4^2 x 15 = 753.6/3 = 251.2

If you're using π as your pi, than just replace 3.14 by π on calculator

Hope that answers your question

8 0
2 years ago
While visiting friends in Brookfield, Janet bought a bike lock that was marked down 20% from an original price of $8.75. If the
Shtirlitz [24]

Answer:

7.49

Step-by-step explanation:

Well first you have to find how much the bike lock cost.

8.75 x 0.2

1.75 = how much 20% of 8.75 is

8.75-1.75

7 = the cost of the bike lock with the 20% markdown

Now you have to find the sales tax.

7 x 0.07

0.49

7 + 0.49

7.49 = total cost with all the stuff

Hopefully this was helpful. There is a shorter method too tho.

3 0
2 years ago
True or false: f(x) is a function. 0 3 4 2 8 12 0 f(x) A. True B. False​
Lady_Fox [76]

Answer: true

Step-by-step explanation: f(x) is a function because each x value (left oval) has one y value (right oval)!

6 0
2 years ago
The diagonals of a rhombus are 10 inches and 24 inches. What is the perimeter of the rhombus, in inches?
umka2103 [35]

Make this brainliest please, and thank you

Answer:

P<em>=52in is ya answer!</em>

3 0
3 years ago
If x1 and x2 are the roots of the equation x^2 +5x-3=0, determine the value of x1^2 + x2^2. I know that I have to use vietas for
Arturiano [62]

Answer:

31

Step-by-step explanation:

Given

x² + 5x - 3 = 0

with a = 1, b = 5, c= - 3 , then

sum of roots x₁ + x₂ = - \frac{b}{a} = - \frac{5}{1} = - 5

product of roots = \frac{c}{a} = \frac{-3}{1} = - 3

Now

(x₁ + x₂)² = x₁² + 2x₁x₂ + x₂² , that is

(- 5)² = x₁² + 2(- 3) + x₂²

25 = x₁² - 6 + x₂² ( add 6 to both sides ), then

x₁² + x₂² = 31

5 0
2 years ago
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