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allsm [11]
3 years ago
7

. In the 1980's it was generally believed that congenital abnormalities affected about 5% of the nation's children. Some people

believe that the increase in the number of chemicals in the environment has led to an increase in the incidence of abnormalities. A recent study examined 384 children and found that 46 of them showed signs of an abnormality. Is this strong evidence that the risk has increased?

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

Answer:

the answer is solved in the image below.

Step-by-step explanation:

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Triangle? If so I don’t know
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Laura wants to show 70 in tens. How many tens will she draw? How do you know?
AURORKA [14]
7. 70 divided by 10 = 7.
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Evelyn is making a candy that contains 25% dark chocolate and the rest milk chocolate. The candy has 3 pounds of milk chocolate.
Vitek1552 [10]

<em>Part A: </em>

Let c represent the total amount of chocolate there is in lbs.

c = 0.25c + 0.75c

<em>Part B: </em>

0.75c represents milk chocolate, and we know that there are 3 lbs of milk chocolate, so you can replace the 0.75c with 3 (representing 3 lbs):

c = 0.25c + 3

Divide all the terms by c:

1 = 0.25 + 3/c

Subtract 0.25 from both sides to combine the like terms:

0.75 = 3/c

Multiply all the terms by c to make the equation easier to work with:

0.75c = 3

Divide both sides by 0.75 to isolate the c and find the total amount of chocolate in pounds.

c = 4

Substitute c for 4 in the term that defines dark chocolate (which was 0.25c)

0.25(4) = 1 pound

Therefore, there was exactly 1 pound of dark chocolate present in the chocolate.

This makes sense, as 1 pound of dark chocolate + 3 pounds of milk chocolate = 4 pounds of chocolate in total, and 1 is 25% of 4 and 3 is 75% of 4.


4 0
3 years ago
4 1/3 x 5 1/3 x 8 1/3 x 6 divided by 2.
Step2247 [10]

Answer:

5,200

Step-by-step explanation:

(4\frac{1}{3} * 5\frac{1}{3} * 8\frac{1}{3}  * 6 )/ 2 = 10,400/2 = 5,200

7 0
3 years ago
What is the least common multiple of 6 and 12? Enter your answer in the box.<br><br> no links please
NNADVOKAT [17]

Answer:

12

Step-by-step explanation:

2   | 6         ,        12

2   | 3          ,        6

3   | 3          ,         3    

    | 1           ,          1

LCM = 2 x 2 x 3 = 12

8 0
2 years ago
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