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sladkih [1.3K]
3 years ago
15

A car is traveling at a constant speed. It travels 3 1/2 miles in 5 1/4 minutes. How long will it take to travel 70 miles.

Mathematics
2 answers:
Ivenika [448]3 years ago
5 0
It will take 105 minutes

Give brainliest please thank you.
Alex3 years ago
4 0

Answer: 122 1/2 minutes

Step-by-step explanation:

I got this answer by first subtracting 5.25-3.50=1.75 and that was how many minutes it took per mile then I multiplied 1.75x70=122.50 to get my answer.

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The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to find out the fraction of peopl
Sholpan [36]

Answer:

1.) .399

2.) {.369, .429}

Step-by-step explanation:

The proportion of criminals in this sample that were caught was \frac{286}{716}=.39944, .399 rounded to three decimal places.

To construct the confidence interval, you need three pieces of information: the statistic, the critical value, and the standard error.

The statistic is given in the first part of the problem with the proportion of criminals in the sample that were caught was .399.

The critical value, we are told, is the z equivalent of 90%, or 1.645. You can find this value using a z table or with the inverse normal function on a calculator.

Finally, we need the standard error. The formula for standard error for a proportion with a single population is \sqrt{\frac{(proportion)(1-proportion)}{sample size} }so in this situation it would be \sqrt{\frac{(.399)(.601)}{716} }=.0183.

The confidence interval would be .399±.018×1.645 or .399±.030 {.369, .429}

5 0
3 years ago
Solve for m.
Salsk061 [2.6K]

Answer:

a

Step-by-step explanation:

solve for m. ;)

7 0
4 years ago
What is the exact circumference of a circle with a diameter of 40 feet?
Irina-Kira [14]

Answer:

The answer is

<h2>126 feet</h2>

Step-by-step explanation:

Circumference of a circle is πd

Where d is the diameter

From the question

d = 40 feet

Circumference of the circle is

40π

= 125.66

= 126 feet to the nearest whole number

Hope this helps you

7 0
4 years ago
3
nirvana33 [79]

Answer:

njrdbtgawewct

3 0
3 years ago
HELPP!!!!!!!!!!!!!!!!
Anvisha [2.4K]

Answer:

Step-by-step explanation:

We'll take this step by step.  The equation is

8-3\sqrt[5]{x^3}=-7

Looks like a hard mess to solve but it's actually quite simple, just do one thing at a time.  First thing is to subtract 8 from both sides:

-3\sqrt[5]{x^3}=-15

The goal is to isolate the term with the x in it, so that means that the -3 has to go.  Divide it away on both sides:

\sqrt[5]{x^3}=5

Let's rewrite that radical into exponential form:

x^{\frac{3}{5}}=5

If we are going to solve for x, we need to multiply both sides by the reciprocal of the power:

(x^{\frac{3}{5}})^{\frac{5}{3}}=5^{\frac{5}{3}}

On the left, multiplying the rational exponent by its reciprocal gets rid of the power completely.  On the right, let's rewrite that back in radical form to solve it easier:

x=\sqrt[3]{5^5}

Let's group that radicad into groups of 3's now to make the simplifying easier:

x=\sqrt[3]{5^3*5^2} because the cubed root of 5 cubed is just 5, so we can pull it out, leaving us with:

x=5\sqrt[3]{5^2} which is the same as:

x=5\sqrt[3]{25}

8 0
3 years ago
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