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NeX [460]
3 years ago
9

Please help with this mathematical question!!

Mathematics
1 answer:
jasenka [17]3 years ago
6 0

Answer:

$192

Step-by-step explanation:

8 percent of 1200 is 96.

96 * 2 = $192

I hope this helped, please mark Brainliest, thank you!!

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Which expression is equivalent to 12^4(x-3)(x+5)/30x(x+3)(x+5)
Rainbow [258]

Answer:

x+5

Step-by-step explanation:

8 0
4 years ago
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The Arizona Department of Transportation wishes to survey state residents to determine what proportion of the population would l
skad [1K]

Answer:

They need to survey 4145 residents.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the z-score that has a p-value of 1 - \frac{\alpha}{2}.

The margin of error is given by:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

99% confidence level

So \alpha = 0.01, z is the value of Z that has a p-value of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

At least how many residents do they need to survey if they want to be at least 99% confident that the sample proportion is within 0.02 of the true proportion?

This is n for which M = 0.02. As we have no estimate for the proportion, we use \pi = 0.5. So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.02 = 2.575\sqrt{\frac{0.5*0.5}{n}}

0.02\sqrt{n} = 2.575*0.5

\sqrt{n} = \frac{2.575*0.5}{0.02}

(\sqrt{n})^2 = (\frac{2.575*0.5}{0.02})^2

n = 4144.1

Rounding up:

They need to survey 4145 residents.

4 0
3 years ago
Pete slid a domino off a bridge and it took 2.3 seconds to hit the Gully below how many feet did the domino fall
Nadusha1986 [10]
This distance can be computed by use of a formula; the distance fallen after a time of t seconds is given by the formula. where g is the acceleration of gravity (9.8 m/s/s on Earth). Since there is no information given aside from time, we'll use this formula d = 0.5gt^2<span>

</span>   d = 0.5gt^2
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4 0
3 years ago
Plz Help!
neonofarm [45]

Answer:

B. x = 62 because 147 – 85 = 62 and 85 + 62 = 147

Step-by-step explanation:

We are given that

\angle ABC=85^{\circ}

Exterior angle=147^{\circ}

We have to find the value of x.

We know that

Exterior angle=Sum of opposite interior angles of triangle

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x+85=147

Subtract 85 from both sides we get

x=147-85

x=62

Option B is true.

B. x = 62 because 147 – 85 = 62 and 85 + 62 = 147

3 0
3 years ago
Why are online payment services necessary?
denis23 [38]
In this digital age, online payment services are added services that will make bill payments easier. 

Online stores and businesses have cropped up and their market is worldwide. To facilitate easy exchange of goods and services, online payment services are offered. 

Online payment services benefit both the seller and the buyer. They buyer no longer need to go to a physical office to deposit his payment, all he has to do is lodge his debit or credit card to pay his bills or online purchases. Sellers also benefit from these services because he'll know that his buyers are not bogus and online payments are real-time transactions. Thus, making payment tracking easier for documentation purposes.
4 0
3 years ago
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