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
Cloud [144]
3 years ago
7

Scott trained for the marathon.

Mathematics
1 answer:
slamgirl [31]3 years ago
6 0

Answer:

See below

Step-by-step explanation:

a)

<u>Day 1</u>

  • 70 min for 10 km
  • Rate = 70/10 = 7 min/km

<u>Day 10</u>

  • 2h40 min for 20 km
  • 2*60+40 = 160 min for 20 km
  • Rate = 160/20 = 8 min/km

<u>Day 20</u>

  • 4 h 15 min for 30 km
  • 4*60 + 15 = 255 min for 30 km
  • Rate = 255/30 = 8.5 min / km

b)

<u>From the rate change we see:</u>

  • 1 min increase when the distance increases from 10 km to 20 km
  • 0.5 min increase when distance increases from 20 km to 30 km

So we see 1 min increase per twice the distance increase

  • With the same rate increase we can expect 1 min increase from 20 km to 40 km, which gives us the rate of 9 min/km
  • With same logic we get 9.055 km/min rate for 44 km distance

<u>Total time it takes:</u>

  • 9.055*44 = 398.42 min = 398.42*1/60 min = 6 h and 38.42 min
You might be interested in
Give the first 4 terms of a sequence who has the explicit formula an = 4n – 13
andreev551 [17]

Step-by-step explanation:

from,

An = 4n -13

A1 = 4 (1) - 13

> A1 = -9

A2 = 4(2) - 13

> A2 = -5

A3 = 4(3) - 13

> A3 = -1

A4 = 4(4) - 13

> A4 = 3

5 0
3 years ago
Jeanette ice cream shop sold 10 sundaes with nuts and 7 sundaes without nuts to the total number of sundaes
Alecsey [184]
The answer to the question is 17
6 0
2 years ago
Read 2 more answers
The average student-loan debt is reported to be $25,235. A student believes that the student-loan debt is higher in her area. Sh
yulyashka [42]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 25235

For the alternative hypothesis,

µ > 25235

This is a right tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 100,

Degrees of freedom, df = n - 1 = 100 - 1 = 99

t = (x - µ)/(s/√n)

Where

x = sample mean = 27524

µ = population mean = 25235

s = samples standard deviation = 6000

t = (27524 - 25235)/(6000/√100) = 3.815

We would determine the p value using the t test calculator. It becomes

p = 0.000119

Since alpha, 0.05 > than the p value, 0.000119, then we would reject the null hypothesis. There is sufficient evidence to support the claim that student-loan debt is higher than $25,235 in her area.

6 0
3 years ago
1.546 + 0.07 how to subtract decimals i dont wanna fail 6th grade
cestrela7 [59]

Answer: 1.616 of adding and subtracting will be 1.476

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
If a^2 + b^2=c^2 then the triangle is a right triangle.
NARA [144]

Answer:

False

Step-by-step explanation:

Measurements are too long on the A leg and B leg for it to be connected by a 12 in leg.

4 0
3 years ago
Other questions:
  • Steph made the box-and-whisker plot shown.
    7·2 answers
  • What is the perimeter of a triangle if the lengths of the sides
    8·1 answer
  • Write the equation in slope-intercept form. -1.5(6y - 2x) = 0​
    13·1 answer
  • Aaron Lloyd what is a?<br>​
    12·1 answer
  • 3x (7+8)x2+6 = ? HM?
    5·1 answer
  • Plzzz help square paralellogram
    7·1 answer
  • Pls help will give points
    10·1 answer
  • Ronnie raises chickens and pigs. He has 220 animals. He counted 640 legs. How many chickens does Ronnie have? Explain your think
    15·1 answer
  • Find the values of x and y. then find the measures of the interior angles of the polygon​
    8·1 answer
  • Find the vertex. f(x) = 9x2 + 1​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!