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
Aleonysh [2.5K]
3 years ago
15

Jada sees that she has taken 8,500 steps . Her step length is 30 inches. How many inches has she walked ? How many miles has she

walked?
Mathematics
1 answer:
poizon [28]3 years ago
4 0

Answer: 255,000 inches; 4.0256121212 miles

Step-by-step explanation:

8,500*30

= 255,000 (inches total)

There are 63,360 inches in a mile

255,000/63,360

= 4.02462121212

You might be interested in
An online streaming service providing television programs claims that a 30-minute program will stream with advertisements that a
trapecia [35]

Answer:

The p-value is significantly low(<0.01), which means that the data provides convincing evidence that the true mean advertisement length is longer than 45 seconds.

Step-by-step explanation:

An online streaming service providing television programs claims that a 30-minute program will stream with advertisements that average 45 seconds. Test if the true mean advertisement length is longer than 45 seconds.

At the null hypothesis, we test if the mean time is of 45 seconds, that is:

H_0: \mu = 45

At the alternate hypothesis, we test if the mean is more than 45 seconds, that is:

H_1: \mu > 45

The test statistic is:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, s is the standard deviation and n is the size of the sample.

45 is tested at the null hypothesis:

This means that \mu = 45

They recorded the times of 21 randomly selected advertisements. The mean and standard deviation for these times are 46.67 and 2.78.

This means that n = 21, X = 46.67, s = 2.78

Value of the test-statistic:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{46.67 - 45}{\frac{2.78}{\sqrt{21}}}

t = 2.75

P-value of the test and decision:

The p-value of the test is the probability of finding a sample mean above 46.67, which is a right-tailed test, with t = 2.75 and 21 - 1 = 20 degrees of freedom.

With the help of a calculator, this p-value is of 0.0062.

The p-value is significantly low(<0.01), which means that the data provides convincing evidence that the true mean advertisement length is longer than 45 seconds.

6 0
3 years ago
the frame of a picture is 28 cm by 32 cm outside and is of uniform width.What is the width of the frame if 192 cm2 of the pictur
natita [175]

Answer:

The width of the frame is equal to 8\ cm  

Step-by-step explanation:

Let

x-------> the width of the frame picture

we know that

(28-2x)(32-2x)=192    

896-56x-64x+4x^{2} =192

4x^{2}-120x+704=0  

Simplify

x^{2}-30x+176=0

The formula to solve a quadratic equation of the form ax^{2} +bx+c=0 is equal to

x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}

in this problem we have

x^{2}-30x+176=0

so

a=1\\b=-30\\c=176

substitute in the formula

x=\frac{30(+/-)\sqrt{(-30)^{2}-4(1)(176)}} {2(1)}

x=\frac{30(+/-)\sqrt{196}} {2}

x=\frac{30(+/-)14} {2}

x=\frac{30+14} {2}=22\ cm  ----> this solution is not logic

x=\frac{30-14} {2}=8\ cm  

The width of the frame is equal to 8\ cm  

8 0
3 years ago
Which is the approximate solution to the system y = 0.5x + 3.5 and y = −A system of equations. y equals 0.5 x plus 3.5. y equals
Elena L [17]

Answer:

The approximate solution of the system of equations is the point (-2.7,2.1)

Step-by-step explanation:

we have

y=0.5x+3.5 -----> equation A

y=-\frac{2}{3}x+\frac{1}{3} -----> equation B

Solve the system by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (-2.714,2.143)

see the attached figure

therefore

The approximate solution of the system of equations is the point (-2.7,2.1)

4 0
3 years ago
Read 2 more answers
Find the value of x in the triangle shown below.
qaws [65]
It should be 80 if I’m correct
6 0
3 years ago
Read 2 more answers
Is the point (2,14) a solution of the equation y = 5x - 3?
tresset_1 [31]

Answer: No it is not

4 0
3 years ago
Other questions:
  • Line m is parallel to line n. The measure of angle 2 is 64°. What is the measure of angle 5?
    10·1 answer
  • 6=-w/8 please solve for w
    10·1 answer
  • Quadrilateral RSTU has vertices R (-3, 1) , S (-2, 3) , T (2, 3) , and U (3, 1). If you translate the quadrilateral four units d
    6·2 answers
  • Consider the series ∑n=1∞158n ∑n=1∞158n determine whether the series converges, and if it converges, determine its value. conver
    12·1 answer
  • One positive number is 4 more than twice another. Their product is 198
    6·2 answers
  • I dont know what I'm doing
    7·1 answer
  • What steps can you use to solve the inequality4-5x&gt;-21 and what is the solution
    5·1 answer
  • (3x-7) (x+5) what is the value of x
    14·1 answer
  • Miranda earns $72,000 annually. She contributes $300 a month to a savings bond. What percent of her salary does she contribute t
    10·2 answers
  • NEED HELP ASAP<br> WILL GIVE BRAINLY
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!