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
garri49 [273]
2 years ago
11

A speedometer has a percent error of 10%. The actual speed of the car is 40 mph. Select from the drop-down menus to correctly co

mplete the statement. The speedometer is likely to show the speed is either ____ mph or ____ mph.
Worth 20 pts and brainliest if correct :)

options for the two drop down menus

a. 30.0
b. 36.0
c. 38.4
d. 40.4

and for the other the options are

a. 40.6
b. 41.6
c. 44.0
d. 50.0
Mathematics
1 answer:
rodikova [14]2 years ago
4 0

Answer

Answer

The speedometer is likely to show the speed is either 36.0 mph or 44.0 mph.        

To prove

Formula

Percentage\ error = \frac{error\times 100}{Exact\ value}

Where error = |Approx value - Exact value |

First case

As given

A speedometer has a percent error of 10%. The actual speed of the car is 40 mph.    

Here

Percentage error = 10%

Exact value = 40 mph

error = - (Approx value - Exact value )

          = - (Approx value - 40 )

          = - Approx value + 40

Put in the formula

10 = \frac{(-Approx\ value + 40)\times 100}{40}

400 = {(-Approx\ value + 40)\times 100}

\frac{400}{100} =-Approx\ value + 40      

\4 =-Approx\ value + 40      

Thus

Approx value = 40 - 4

Approx value = 36 mph

Therefore Option (b) is correct .

Second Case

error =  (Approx value - Exact value )

          =  (Approx value - 40 )

          =  Approx value - 40

Put in the formula

10 = \frac{(Approx\ value - 40)\times 100}{40}

400 = {(Approx\ value - 40)\times 100}

\frac{400}{100} = Approx\ value - 40      

\4 = Approx\ value - 40      

Thus

Approx value = 40 + 4

Approx value = 44 mph

Therefore Option (c) is correct .

You might be interested in
Given a dilation with the origin O (0, 0), by observation determine the scale factor "K."
timurjin [86]
15 is 3 times 5. The point (5, 0) is dilated to the point (15, 0) by using a factor of
  K = 3.
7 0
3 years ago
Read 2 more answers
Tell whether -2 is a solution of the inequality n-5<8
ruslelena [56]

Answer:

-2 is a solution

Step-by-step explanation:

-2-5<8

-7<8

6 0
3 years ago
Complete the Area Model that would be used to multiply<br><br><br><img src="https://tex.z-dn.net/?f=3x%28x%5E2%2B4x%2B5%29" id="
lianna [129]

Answer:

A triangle is shown Below based on this triangle which one of the following statements is true

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
198.9 grams equals how many ounces?
Rudiy27

Simply the answer is 7 ounces :D

5 0
3 years ago
(50 pts!) Help pls<br><br>Find the value of x
Lera25 [3.4K]

Answer:

x = 3.5.

Step-by-step explanation:

This is an equilateral triangle ( as all angles = 60 degrees) so all 3 sides are of equal length.

Thus 2x - 3 = 4

2x = 7

x = 3.5.

4 0
2 years ago
Read 2 more answers
Other questions:
  • g A window is being built and the bottom is a rectangle and the top is a semi-circle. If there is 12 meters of framing materials
    5·1 answer
  • A car travels 17 miles on one gallon of gas.
    8·1 answer
  • The collection of whole numbers is an example of a set. OA. True O B. False​
    5·1 answer
  • Sarai purchased 1 12 13pounds of apples, bananas, and kiwis for a fondue party. Apples cost $3.50 per pound, bananas cost $0.75
    13·2 answers
  • What is 7,464,000.55 rounded to the nearest hundred thousand?
    14·2 answers
  • The ratio of the volumes of two similar solid polyhedra is equal to the square of the ratio between their edges. True or False?
    7·2 answers
  • Keira used yards of fabric to make a quilt. After making the quilt, she had yards of the fabric left.
    13·1 answer
  • Sue and oliver share £160 in the ratio 3:5<br> Work out how much more oliver get conpared to cue.
    9·2 answers
  • Please help! which expression is equivalent to (-√-1)?
    12·1 answer
  • Solve for z -7(z-6)=-70
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!