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Stolb23 [73]
2 years ago
10

Please help I’ll make you the brainiest

Mathematics
2 answers:
kipiarov [429]2 years ago
6 0

Answer:

It's

{( - 1)}^{ \frac{3}{4} }

Step-by-step explanation:

\sqrt[4]{ {( - 1)}^{3} }  =  \sqrt[4]{ - 1}

elena-s [515]2 years ago
4 0
I think it’s the first option
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Question 1? pls someone help!!
Mashcka [7]
Choose choice 3. It will pass through (-2,2) and will be parallel to the equation in the question.
ANSWER CHOICE 3 IS THE ANSWER
7 0
3 years ago
The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st
Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.99}{2} = 0.005

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.005 = 0.995, so z = 2.575

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

M = z*\frac{\sigma}{\sqrt{n}}

2 = 2.575*\frac{7.8}{\sqrt{n}}

2\sqrt{n} = 2.575*7.8

\sqrt{n} = \frac{2.575*7.8}{2}

(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}

n = 100.85

Rounding up

We need a sample size of at least 101

8 0
3 years ago
Read 2 more answers
Write the slope-intercept form of the equation for the line.
svetlana [45]

Answer:

its 4/2 or simplified to 2/1

Step-by-step explanation:

mark me brainliest pls

4 0
2 years ago
Find perimeter of the semicircular region​
mrs_skeptik [129]

Answer:

4. 87.96 yd

5. 47.12 ft

6. 34.56 cm

Step-by-step explanation:

4. diameter(d) = 28 yd,

perimeter = πd = 87.96 yd (rounded to 2 dp)

5. radius(r) = 7.5 ft

perimeter = 2πr = 47.12 ft (rounded to 2 dp)

6. diameter (d) = 11 cm

perimeter = πd = 34.56 cm

Answered by GAUTHMATH

8 0
3 years ago
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At a certain company, 64.5% of the employees have engineering degrees. Express this percent as a decimal
Verdich [7]

At a certain company, 64.5% of the employees have engineering degrees.

To express the percentage as a decimal we need to remove the % symbol.

To remove % symbol we always divide by 100

When we divide by 100 we move the decimal point two places to the left.

64.5 =\frac{64.5}{100}  = 0.645

The decimal vale of 64.5% is 0.645

5 0
3 years ago
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