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daser333 [38]
2 years ago
6

Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows the normal prob

ability distribution with a mean of 36 hours and a standard deviation of 5.1 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 25 batteries.
What can you say about the shape of the distribution of the sample mean?
Mathematics
1 answer:
Usimov [2.4K]2 years ago
4 0

Answer:

UNTUU HULLUM

Overfishing occurs when more fish are removed from an ecosystem than can be maintained by the population,

Overfishing can lead to significant population declines in economically important species. The passage describes

additional impacts of overfishing on populations.

pressure affects

salmon fishery of

and 1970s, pink

n this fishery were

ihile allowing

nd 1974, the

inland spawning

approximately

to spawn at the

Isted that fishing

lower growth rates

According to the passage, which mechanism explains the observed changes in fish size over time?

A. Smaller fish produce fewer eggs than larger fish do, so they contribute fewer offspring to the next

generation.

B. Fish that are small enough to escape fishing nets are more likely to survive than larger fish.

C. Scientists found that Atlantic silversides exhibited changes in feeding and foraging rates after four

generations of selection,

D. The average size of pink salmon returning to spawn decreased from 6.0 pounds to approximately 4.5

pounds.

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If we were to do this equation how would I solve it
s344n2d4d5 [400]

Answer:

- 6 \frac{1}{3}

Step-by-step explanation:

\frac{10}{3}  -  \frac{1}{3}  -  \frac{29}{3}  - ( -  \frac{1}{3} ) \\  \\  =  \frac{10}{3}  -  \frac{1}{3}  -  \frac{29}{3}   +   \frac{1}{3}  \\  \\ =  \frac{10}{3}   -  \frac{29}{3}  -  \frac{1}{3}  +   \frac{1}{3}  \\  \\ =  \frac{10 - 29}{3}   \\  \\  =  \frac{ - 19}{3}  \\  \\  =  - 6 \frac{1}{3}

6 0
3 years ago
A profit of a football club after a takeover is modeled by p(t) = t3 - 14t2 + 20t + 120, which t is the number of years after th
Bogdan [553]
T = 5, so after 5 years
p(t) = t^3 - 14t^2 + 20t + 120

Take derivative to find minimum:
p’(t) = 3t^2 - 28t + 10

Factor to solve for t:
p’(t) = (3t - 2)(t - 5)
0 = (3t - 2)(t - 5)

0 = 3t - 2
2 = 3t
2/3 = t

Plug 2/3 into original equation, this is a maximum. We want the minimum:

0 = t - 5
5 = t

Plug back into original:
5^3 - 14(5)^2 + 20(5) + 120
125 - 14(25) + 100 + 120
125 - 350 + 220
- 225 + 220
p(5) = -5
6 0
3 years ago
Rearrange the formula A = <br> Θr2<br> 2<br> for Θ.
Lina20 [59]

Answer:

\theta=\frac{2A}{r^2}

Step-by-step explanation:

Given : The formula A=\frac{\theta r^2}{2}

We have to rearrange the given formula for \theta

Consider the given formula A=\frac{\theta r^2}{2}

Multiply both side by 2, we have,

2A={\theta r^2

Divide both side by r^2 , we have,

\frac{2A}{r^2}= \frac{\theta r^2}{r^2}

Simplify, we get,

\frac{2A}{r^2}=\theta

Thus, \theta=\frac{2A}{r^2}  

3 0
3 years ago
Read 2 more answers
wich is the best approximation of the diameter of a circle with a circumference of 34.13 centimeters?
lara31 [8.8K]
The diameter of the circle is 10.86
5 0
3 years ago
Use quadratic regression to find
vovangra [49]

Answer:

y = 6x² -13x -5

Step-by-step explanation:

(1,-12) (2,-7) (5,80)

y = ax² + bx + c

-12 = a*1² + b*1 + c = a+b+c    (1)

-7 = 4a + 2b + c    (2)

80 = 25a + 5b + c   (3)

(2)-(1): 3a + b = 5    (4)

(3)-(2): 21a + 3b = 87   (5)

(4)*3:     9a + 3b = 15    (6)

(5)-(6):  12a = 72      a = 6

(4)                             b = -13

(2)                             c = -5

4 0
3 years ago
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