1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
iren2701 [21]
3 years ago
8

Dan runs 8 miles in 84 minutes. At the same rate how many minutes would be take to run 6 miles

Mathematics
2 answers:
Lorico [155]3 years ago
4 0

Answer: It will take Dan 63 minutes to run 6 miles.

Step-by-step explanation:

\frac{8}{6}  = \frac{84}{x}  do  cross product.

8x = 504

x= 63  

wel3 years ago
3 0

Answer:

63 minutes

Step-by-step explanation:

Set up a ratio equation.

(8 miles/84 minutes should be equal to 6 miles/x amount of minutes). Set the two fractions equal to each other and solve for x by cross multiplying.

You might be interested in
E<img src="https://tex.z-dn.net/?f=e%5E%7Bx%7D%20-%20e%5E%7B-2%7D%20%3D-2" id="TexFormula1" title="e^{x} - e^{-2} =-2" alt="e^{x
pav-90 [236]

$e\cdot e^x -e^{-2}=-2$

$\implies e^{x+1}=e^{-2}-2$

note that RHS is negative. (because e with negative exponent is less than 1)

and LHS is always positive.

so there cannot be any solution

3 0
3 years ago
In a college student poll, it is of interest to estimate the proportion p of students in favor of changing from a quarter-system
Contact [7]

Answer:

n=206

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 99% of confidence, our significance level would be given by \alpha=1-0.99=0.01 and \alpha/2 =0.005. And the critical value would be given by:

t_{\alpha/2}=-2.58, t_{1-\alpha/2}=2.58

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

And on this case we have that ME =\pm 0.09, we can use as prior estimate of p 0.5, since we don't have any other info provided, and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.09}{2.58})^2}=205.44  

And rounded up we have that n=206

3 0
3 years ago
NEED HELP FAST!!!
faust18 [17]

In order to solve the formula

C=\pi d

in terms of d, you simply have to divide both sides by pi:

d=\dfrac{C}{\pi}

The total height of the earring is the sum of the diameters of the circles. Given their circumferences, the diameters are

d_1=\dfrac{6}{\pi},\quad d_2=\dfrac{8}{\pi}

So, the total height is

h=d_1+d_2=\dfrac{6}{\pi}+\dfrac{8}{\pi}=\dfrac{14}{\pi}

6 0
3 years ago
2) Find each angle measure to the nearest degree
UNO [17]

Answer: AB=7.74in.;m<A

=57*;m<B=33*

Step-by-step explanation

this symbol means degrees *

8 0
3 years ago
Find the slope: x + 7y = 21​
Aleksandr [31]

Answer:  1/7

Step-by-step explanation:

solve for y

7 0
3 years ago
Other questions:
  • There is a line that includes The point (1,7) and has a slope of 5 what is it’s equation in the slope-intercept form
    10·1 answer
  • Indicate which of the following situations inferential statistics: a. An annual stockholders' report details the assets of the c
    15·1 answer
  • a farmer grows 100 pounds of potatoes. the farmer sells them to a grocer who will devide them in to 5 pound bags and 2 pound bag
    12·2 answers
  • The mass of a small virus is 10^-20 kg. The mass of an average human cell is 10^-12 kg. Which of the two has lesser mass? how ma
    10·2 answers
  • What is the value of -19- (-18)?
    13·2 answers
  • 3≤7+g<br> Another solution one :)<br><br> What is the solution?
    6·1 answer
  • HELP!! Please, I'll give the first person to get it right a brainliest!<br> 0.8/y =2: 3/4
    5·1 answer
  • Your class collected money to buy turkeys and hams for
    8·1 answer
  • Can I get a bit of help
    13·1 answer
  • The dollar value v(t) of a certain car model that is t years old is given by the following exponential function. v(t)=29,900(0.7
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!