3 years ago

Will make brainliest if answered correctly

Mathematics

2 answers:

slava [35]3 years ago

6 0

The average speed was 62.5 kilometers.

stealth61 [152]3 years ago

3 0

Answer:

3.75Km

Step-by-step explanation:

to find Average speed you do distance over time so it would be 225/25=3.75

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Don’t undersatnd please help

Ludmilka [50]

The inequality of this question would be 4

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3 years ago

If Darren completed 25% of his science project on Monday, what percentage of his project is left to complete? A) 25% B) 50% C) 7

Pie

75% I hope this helps you out

4 0

3 years ago

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Given the area of a circle is 201.06cm2, find the diameter and circumference.

mestny [16]

given the area of circle o6.

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3 years ago

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A study of recent records of car accidents revealed that average proportion of drivers who were distracted by their phones at th

aksik [14]

Answer:

At least 547 records need to be studied.

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 interval $1-\alpha$ , we have the following confidence interval of proportions.

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

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

And the margin of error is:

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

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $z = 1.96$ .

In this problem, we have that:

$M = 0.04, p = 0.35$

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

$0.04 = 1.96\sqrt{\frac{0.35*0.65}{n}}$

$0.04\sqrt{n} = 0.93486$

$\sqrt{n} = 23.37$

$n = 546.2275$

At least 547 records need to be studied.

6 0

3 years ago

Divide (x4 – 11x3 – 49x2 + 899x – 2506) ÷ (x – 8).

pickupchik [31]

Okay first make sure you change negative 8 to a positive 8.
Set the problem up 8 -11 -49 899 -2506
__________________
8 -11 -49 899 -2506
-88 -1096 -1576
____________________
-11 -137 -197 -4082

Your answer will be
-11x^3 - 137x^2 - 197x - 4082

6 0

3 years ago