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
fredd [130]
3 years ago
6

Julia can finish a 20-mile bike ride in 1.2 hours. Katie can finish the same bike ride in 1.6 hours. To the nearest tenth of a m

ile, how much faster does Julia ride than Katie?
Mathematics
1 answer:
Brums [2.3K]3 years ago
4 0

Answer:

Step-by-step explanation:

julia : 20 miles in 1.2 hrs = (20/1.2) = 16.67 miles per hr

katie : 20 miles in 1.6 hrs = (20 / 1.6) = 12.5 miles per hr

how much faster does julia ride then katie...

16.67 - 12.5 = 4.17 rounds to 4.2 miles per hr faster <==

You might be interested in
Find the distance between each pair points (-5,3) , (-4,-5)?
MrRa [10]

Answer:

\sqrt{65}

Step-by-step explanation:

distance between two points:

d=\sqrt{(x_{2}-x_{1})^{2}+( y_{2}-y_{1})^{2}}

we have:

d=\sqrt{(-4-(-5))^{2}+(-5-3)^{2}} \\\\d=\sqrt{1^{2}+(-8)^{2}} \\\\d=\sqrt{65}

4 0
3 years ago
Find two consecutive integers whose sum is 93. (Show work)
kenny6666 [7]

You are looking for three consecutive integers whose sum is 93. First, divide 93 by 3 and get 31. Go one above 31 and one below. You get 30, 31 and 32 which sum to 93.

5 0
3 years ago
PLEASE HELP WILL MARK BRAINLIEST
prisoha [69]

Answer:

45

Step-by-step explanation:

8 0
3 years ago
21 Last year Chelsea and Sonya took 236 pictures during Thanksgiving. This year Chelsea and Sonya each took the same amount of p
Leokris [45]

Let 'c' represent the number of pictures Chelsea took.

Let 's' represent the number of pictures Sonya took.

For last year's Thanksgiving, c + s = 236

For this year's Thanksgiving, let 'x' represent the number of photos taken in total. x = c + s, where c and s are two integers that are the same (c = s).

And we know that for both years, c + s + x = 500.

As we know that c + s is already 236 from last year, we can remove c + s from the equation in bold and replace it with 236 instead.

236 + x = 500.

Now we have to isolate the x term.

x = 500 - 236

x = 264.

We know that x = c + s, where c and s are the same, so we can just use one of the variables and double it (so you either get 2c or 2s - it doesn't matter which one you pick because they're both the same).

2c = 264

c = 132

c = s

s = 132.

Both took 132 pictures this year.

4 0
3 years ago
An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maxim
Flura [38]

Answer:

The 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for the population mean, when the population standard deviation is not provided is:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

The sample selected is of size, <em>n</em> = 50.

The critical value of <em>t</em> for 95% confidence level and (<em>n</em> - 1) = 49 degrees of freedom is:

t_{\alpha/2, (n-1)}=t_{0.05/2, 49}\approx t_{0.025, 60}=2.000

*Use a <em>t</em>-table.

Compute the sample mean and sample standard deviation as follows:

\bar x=\frac{1}{n}\sum X=\frac{1}{50}\times [1+5+6+...+10]=6.76\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{49}\times 31.12}=2.552

Compute the 95% confidence interval estimate of the population mean rating for Miami as follows:

CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}

     =6.76\pm 2.000\times \frac{2.552}{\sqrt{50}}\\\\=6.76\pm 0.722\\\\=(6.038, 7.482)\\\\\approx (6.0, 7.5)

Thus, the 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

7 0
3 years ago
Other questions:
  • How many liters are in 1 dekaliter? Use the metric table to help answer the question.
    6·1 answer
  • Use the angle sum identity to find the exact value of cos 105
    11·1 answer
  • Which equation represents the line shown in the graph below? y = 5x + 2 y = 2x — 5 y = 2x + 5 y = 5x — 4
    6·1 answer
  • The standard unit of measurement for length is the:<br> mile<br> centimeter<br> meter<br> yard
    7·1 answer
  • How bad is the heavy traffic? You can walk 15
    6·2 answers
  • What is the value of x?
    5·1 answer
  • Can anybody help me with this please
    6·1 answer
  • Is it Y-axis or X-axis I need by 11:30
    13·2 answers
  • Use deductive reasoning to solve the equatlon 2-3x = -4. The solution Is x =​
    10·1 answer
  • The sum of 3 times the value of x and 2 is equal to 4 less than 5 times the value of x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!