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Sonbull [250]
3 years ago
7

In a certain chemical, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 760 grams of copper. How many gram

s of zinc does it​ contain?
1) 760 grams
2) 3,610
3) 30,400
4) 190 or 160 grams
Mathematics
1 answer:
Law Incorporation [45]3 years ago
6 0
160 grams of zinc. 760/ 19 is equal to 40 so then we’d want to multiple 4 x 40 because that’s how much were growing by so then zinc is 160 grams
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Du/dr=(1+sqrt(r))/(1+sqrt(u))_
Maslowich
Solution is supposed to be as follows
<span>u+<span>2 / 3</span><span> u<span>^3/2</span></span>
=r+<span>2 / 3</span><span> r^<span>3/2</span></span> + <span>c</span></span>
4 0
3 years ago
Suppose the contact rate for a phone survey is 78% and that 22% of people will participate in that survey. Assume that agreeing
Gnoma [55]
Remember that, for independent events, the probability that both occurr is the product of the individual probabilities.

a) Probability of being contacted: 78% = 0.78

Probaility of refusing: 1 - 22% = 1 -0.22 = 0.78

Combined probability: 0.78*0.78 = 0.6084

b) The probability of failing to contact or making contact and not geeting them to agree 1 - the probability of contacting and getting them to agree.

The probabilityof contacting and getting them to agree is 0.78*0.22 = 0.1716

The the answer to this question is 1 - 0.1716 = 0.8284


 
8 0
4 years ago
What is the product of 3x50x18x2? A:1,800 B:5,400 C:540 D:2,700
Delvig [45]

3 x 50 x 18 x 2

3 x 50 = 150

18 x 2 = 36

150 x 36 = 5400

B

8 0
3 years ago
Please answer this question now
nirvana33 [79]

Answer:

m∠CDE < m∠DEC < m∠ECD

OR

m∠D < m∠E < m∠C

Step-by-step explanation:

According to the angle-side inequalities theorem: In a triangle, the angle opposite to a longer side is larger, and vise versa, the side opposite to a larger angle is longer.

So, the order from smallest to largest is:

m∠CDE < m∠DEC < m∠ECD

OR

m∠D < m∠E < m∠C

5 0
3 years ago
Find the area of the polygon with E(-3,2), F(1,5), G(5,-1), H(1,-5).
kykrilka [37]

Answer:

40

Step-by-step explanation:

-3   2

               -15  -   2         =      -17

1     5

                 -1    -  25      =     -26

5<em> </em>   -1

                -25    -   (-1)   =     - 24

1   <em> -5</em>

                 2      -   <em>15</em>    =     -13

<em>-3</em>   2

area = |-17 - 26 - 24 - 13|/2 = |-80|/2 = 80/2 = 40

Answer: 40

6 0
3 years ago
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