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almond37 [142]
3 years ago
7

. A medical researcher estimates the percentage of children who are exposed to lead-base paint, adding that he believes his esti

mate has a margin of error of about 3%. Explain what the margin of error means.
Mathematics
1 answer:
belka [17]3 years ago
8 0

Answer:

Step-by-step explanation:

Margin of error Percentage: A margin of error tells you how many percentage points your results will differ from the real population value. For example, a 90% confidence interval with a 3 percent margin of error means that your statistic will be within 3 percentage points of the real population value 90% of the time.

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Vera_Pavlovna [14]

Answer:

x=3 y=1

Step-by-step explanation:

-x-y=1

y=-x+4

x=-y-1

x=-y+4

x=-1+4

<u>x=3</u>

y=-3+4

<u>y=1</u>

7 0
2 years ago
2. What is the approximate value of b in the triangle below?
s344n2d4d5 [400]

Answer:

d) 17.6

Step-by-step explanation:

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3 years ago
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Roman55 [17]

Answer:

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Step-by-step explanation:

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3 years ago
SOLUTION: a diver jumps from a diving board that is 24 feet above the water. the height of the diver is given by h= -16(t-1.5)(t
lara [203]

Answer:

The diver will hit the water at 1.5 seconds

Step-by-step explanation:

Given

h= -16(t-1.5)(t+1)

Required (Missing from the question)

When will the diver hit the water?

To do this, we simply solve for t

When the diver hits the water, the height is 0 (at that point)

So, substitute 0 for h in h= -16(t-1.5)(t+1)

0= -16(t-1.5)(t+1)

Divide both sides by -16

\frac{0}{-16} =\frac{-16(t-1.5)(t+1)}{-16}

\frac{0}{-16} =(t-1.5)(t+1)

0 =(t-1.5)(t+1)

(t-1.5)(t+1)=0

Split

t - 1.5 = 0 or t + 1 = 0

Solve for t

t = 1.5 or t = -1

But time (t) can not be negative.

So:

t = 1.5

Hence, the diver will hit the water at 1.5 seconds

8 0
3 years ago
The table shows the number of male and female constants who did and did not win a prize.
Alla [95]

Answer:

3/10, or 23.1%

Step-by-step explanation:

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