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
evablogger [386]
3 years ago
5

Mary estimated that it would take 3 hours to write a book report, but it actually took her 5 hours. What is the percent error fo

r her estimate? (Hint: subtract and then divide by actual number)
Mathematics
1 answer:
Eduardwww [97]3 years ago
6 0

Answer:

The percent error is 40%.

Step-by-step explanation:

5 (actual time) - 3 (estimated time) = 2

2 divided by 5 (actual time) = 0.4

0.4 x 100 = 40%

You might be interested in
Choose a number between 67 and 113 that is a multiple of 2 6 and 10
Lilit [14]
Im going to go on and say that it is 90 
8 0
3 years ago
Read 2 more answers
PLEASE HELP!!!! A boat can travel at an average speed of 10 miles per hour in still water. Traveling with the current, it can tr
Soloha48 [4]

Answer:

  • 2 mph

Step-by-step explanation:

Let the speed of current be x

<u>Speed of the boat in same direction as current is</u>

  • 10 + x

<u>Speed against the current is</u>

  • 10 - x

<u>Based on the given we get the equation for time</u>

  • 6/(10 + x) = 4/(10 - x)

<u>Solving for x</u>

  • 6(10 - x) = 4(10 + x)
  • 60 - 6x = 40 + 4x
  • 6x + 4x = 60 - 40
  • 10x = 20
  • x = 2

The answer is 2 mph

7 0
3 years ago
Which of the following uses scientific notation<br> incorrectly?<br> (View picture)
abruzzese [7]
The two that use scientific notion incorrectly are...

G: two places before the decimal when there should only be one.
H: there is no decimal.
6 0
3 years ago
Which situation describes a time when it would be all right to round the numbers?
Alborosie
I think the correct answer is B
6 0
3 years ago
Point R(−3, 9) belongs to the graph of the function y= k/x^2 . Find the value of k.
lorasvet [3.4K]

Answer:

k = 81

Step-by-step explanation:

y = k / x²

Plug in values.

9 = k / (-3)²

9 = k / 9

Solve for k by multiplying both sides by 9.

k = 81

4 0
3 years ago
Other questions:
  • A cone has radius 5x cm and a height 12x cm.A sphere has radius r cm.The cone has the same total surface area as the sphere.Show
    5·1 answer
  • Help me please I can't find the volume
    10·1 answer
  • Find the slope of the line through the points (3,7) and (5,19)
    11·1 answer
  • Suppose a population of honey bees in Ephraim, UT has an initial population of 2300 and 12 years later the population reaches 13
    10·1 answer
  • what is the approximate percent increase when the population of a town increases from 12089 to 15025? round the amounts to the n
    8·2 answers
  • Simplify to create an equivalent expression. <br><br>1+4(6p-9)<br><br>please help. ​
    7·1 answer
  • Hon rolled a bowling ball so that it traveled 60 feet in 3 seconds.
    5·1 answer
  • Twice the difference of a number and six is less than the number decreased by two
    8·1 answer
  • What is the surface area of the triangular prism shown?
    13·1 answer
  • A tv show had 4.4 x 106 viewers in the first week and 3.1 x 106 viewers in the second week. determine the average number of view
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!