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____ [38]
3 years ago
5

Weights of women in one age group are normally distributed with a standard deviation σ of 18 lb. A researcher wishes to estimate

the mean weight of all women in this age group. Find how large a sample must be drawn in order to be 90 percent confident that the sample mean will not differ from the population mean by more than 2.0 lb.
Mathematics
1 answer:
sergeinik [125]3 years ago
6 0
Could you be clearer
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A plane rises from takeoff and flies at an angle of 90° with the horizontal runway when it has gained 400 feet find the distance
trasher [3.6K]

Answer:

2879ft

Step-by-step explanation:

The level runway (x), height gained (h), and distance travelled (r) form a right-angled triangle with base angle  

10

∘

.

We may hence use trig ratios to solve for any of the unknowns, in particular for the distance r as follows :

6 0
3 years ago
What is the number 4.082 rounded to nearest hundreth?
iragen [17]
The 2nd number position after the decimal is always the hundredth position, so we will work from there. To round a number, you must examine the number that comes after the number you are trying to round. In this case the number you are trying to round is the 8 so we have to look at the 2. because the two is a number less than 5, the 8 will remain an 8 and your rounded answer is 4.08. If that two had been a number greater than 5 than the 8 would have become a 9 and your answer would have been 4.09. When rounding always remember: "5 to 9, up the line; 0 to 4, down to the floor."
7 0
2 years ago
V=1/3Πr^2(2r+h)
stiv31 [10]

Answer:

h= \frac{−2.094395r3+v}{1.047198r2}

Step-by-step explanation:

v=(  \frac{1}{3} (3.141593))(r2)(2r+h)

Step 1: Flip the equation.

1.047198hr2+2.094395r3=v

Step 2: Add -2.094395r^3 to both sides.

1.047198hr2=−2.094395r3+v

Step 3: Divide both sides by 1.047198r^2.

h= \frac{−2.094395r3+v}{1.047198r2}

3 0
3 years ago
Read 2 more answers
Simplify:<br><br> -10(x – 7) – 3x<br> A. -13x + 70<br> B. -13x + 3<br> C. 7x + 7<br> D. 7x + 10
Fiesta28 [93]
-10(x-7) -3x
= -10x + 70 - 3x
= -13x + 70

The answr is A
5 0
3 years ago
Read 2 more answers
At an airport it costs 7 $ to park and 5$ per
OleMash [197]

Answer:

12

Step-by-step explanation:

5 0
3 years ago
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