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3 years ago

Which of the following is a multiple of 5? A. 48 B. 532 C. 235 D. 17

Mathematics

2 answers:

abruzzese [7]3 years ago

7 0

Multiple's of 5 are these:5<span>,10,15,20,25,30,35,40,45. :)</span>

Luda [366]3 years ago

5 0

Your answer would be C. because C. ends with a 5 none of the others do. hope this helps

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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

The area of a circular fountain is 121pi square feet. What is the diameter of the fountain?

Alla [95]

Answer:

22 feet

Step-by-step explanation:

Area of circle = pi(r²)

the square root of 121 is 11, so r = 11

d = 2r

d = 22

7 0

3 years ago

Cd + ed = m solve for d

lakkis [162]

Answer:

677

Step-by-step explanation:

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3 years ago

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3. Combine terms: 123a + 26b -4b – 16a.

m_a_m_a [10]

Answer:C) -4a+22b because u add 12a ➕-16a and u get negative 4 then u mines 26b-4b and u get 22

Step-by-step explanation:

6 0

3 years ago

Find all the real cube roots of -0.000125

Ira Lisetskai [31]

We have the value -0.000125

Since this is negative value the cube number cannot be positive since it will not give an negative answer

hence the answer should be a negative number

this already eliminates the option A, B and D

now we have

$\sqrt[3]{-0.000125}$

$\sqrt[3]{(-0.05).(-0.05).(-0.05)}$

=-0.05 (option C)

6 0

3 years ago