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Serjik [45]
3 years ago
9

Pls help me fast ASAP

Mathematics
1 answer:
cricket20 [7]3 years ago
8 0
Since x=-4 and f(x) =x^3 when - 5<=x<=2,
f(-4)= -64

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e 400 trials in which the assistant maintained a neutral expression, the driver stopped in 229 out of the 400 trials. Find a 95%
Fittoniya [83]

Answer:

Step-by-step explanation:

n = 400

Proportion p = 229/400= 0.5725

For 95% confidence interval we use Z value as 1.96

Std error = 0.025

margin of error = 1.96*0.025

Confidence interval 95% = 0.5725±Margin of error

= (0.524, 0.621)

b) When smiled x becomes 277

p = 0.6925

Std error = 0.023

Margin of error= 1.96*0.023

Confidence interval = (0.647, 0.738)

Smiling increases the chances of stopping since mean and conidence interval bounds are showing increasing trend.

6 0
2 years ago
The are of a rectangular community the graden is 300 square feet. The length of a rectangular graden is three times its width. F
Keith_Richards [23]

Answer:

  • length: 30 ft
  • width: 10 ft

Step-by-step explanation:

The description of the garden fits that of 3 squares arranged side-by-side. The area of each of those would be 100 ft², so their side length would be ...

  s = √A= √(100 ft²) = 10 ft

This dimension is the width of the garden, whose length is 3 times this amount.

The length and width of the garden are 30 ft and 10 ft, respectively.

3 0
3 years ago
2. Write a function that models the relationships among x, y, and r. (Hint: Use the Pythagorean theorem.) Then solve the equatio
In-s [12.5K]

Answer:

r^{2} = \sqrt{y^{2} + x^{2} }

Then just plug in the values depending on the bridge you chose I'm pretty sure

also can I get brainliest?

6 0
3 years ago
NEED HELP ASP!!
balu736 [363]
D) 34/5 because 6(5) = 30 30+4=34 , so its 34/5
7 0
3 years ago
Read 2 more answers
What is the square root of 9
Nuetrik [128]
It is 3. Because a square root is anything times itself to make an answer. For example:
3 \times 3 = 9 \\ so \\  \sqrt{9 }  = 3
8 0
3 years ago
Read 2 more answers
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