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
Paul [167]
3 years ago
10

mark spent 135$ on his comic book collection. he just sold it online for 310$. approximately what is the profit as a percent of

his original cost?
Mathematics
1 answer:
Vilka [71]3 years ago
5 0

Answer:

70% is approximately the answer

Step-by-step explanation:

135 x 2 = 270

310 - 270 = 40

35 out of 40 is 7/8.

The answer should be approx 70, I can not make sure.

You might be interested in
(2.75 x 107) + (1.23 x 108) simplify
Thepotemich [5.8K]

Answer:

427.09

Step-by-step explanation:

(2.75 x 107) + (1.23 x 108)

294.25 + 132.84 = 427.09

6 0
2 years ago
A fish tank has black and white fish in the ratio of 2 to 6 as shown below Which is another ratio that can describe the black to
ira [324]
1:3, Because you can simplify the numbers by dividing by two.
 
8 0
3 years ago
It Says Least To Greatest With These Numbers 7/12 0.75 5/6
Umnica [9.8K]
If you mean what I think you mean then I think it is
7/12, 5/6, and then 0.75
I could be wrong though but I hope I am right good luck
5 0
3 years ago
If f(x) = x 2 + 1, find f(a + 1). a 2+ 2 a + 2 a 2 + 2 a 2+ a + 1
goblinko [34]

2a+3

Step-by-step explanation:

5 0
3 years ago
A radio manufacturer believes that the length of life of WPPX model radio is normal with µ=12 years and σ=2.5 years. (a) What pe
kicyunya [14]

Answer:

(a) 5.48%

(b) 17.82 years

(c) 21.19%

(d) 15.21 years

Step-by-step explanation:

z = (x-μ)/σ,

where

x is the raw score

μ is the population mean

σ is the population standard deviation.

µ=12 years and σ=2.5 years.

(a) What percent of the radios will function for more than 16 years?

For x = 16

z = 16 - 12/2.5

z = 1.6

Probability value from Z-Table:

P(x<16) = 0.9452

P(x>16) = 1 - P(x<16)

1 - 0.9452

= 0.054799

Converting to percentage = 0.054799 × 100

= 5.4799%

Approximately = 5.48%

(b) Suppose the company decides to replace 1% of the radios. Find the length of the guarantee period. i.e. find X.

find the z score of the 99th percentile = 2.326

Hence:z = (x-μ)/σ

2.326 = x - 12/2.5

Cross Multiply

2.326 × 2.5 = x - 12

5.815 = x - 12

x = 12 + 5.815

x = 17.815

Approximately = 17.82 years

(c) What percent of the radios that will fail to satisfy the guarantee period of 10 years? , i.e. less than 10 years?

When x < 10

Hence,

z = 10 - 12/2.5

z = -0.8

Probability value from Z-Table:

P(x<10) = 0.21186

Converting to percentage

0.21186 × 100

= 21.186%

Approximately = 21.19%

(d) If 10% of the radios will function for more than X years, find X.

The z score would be : 100 - 10%

= 90th percentile z score

We find the z score of the 90th percentile = 1.282

Hence:z = (x-μ)/σ

1.282 = x - 12/2.5

Cross Multiply

1.282 × 2.5 = x - 12

3.205 = x - 12

x = 12 + 3.205

x = 15.205

Approximately = 15.21 years

4 0
3 years ago
Other questions:
  • IXL NEED HELP ASAP (10 POINTS)
    10·2 answers
  • Can you help answer this question
    13·1 answer
  • What is .336 written as a fraction?
    6·1 answer
  • What is 21 divided by something =7
    13·2 answers
  • Fernando has $10 to buy snacks for his friends at the baseball game. A
    10·1 answer
  • 3 Lizzie buys 3 clocks for a total cost of £50 at a car boot sale.
    5·1 answer
  • The correct answer is...?
    11·1 answer
  • Y=2x+4, would both equations have a constant rate of change?
    5·1 answer
  • PLEASE HELP WITH PART A AND B- PLEASE HAVE WORKKK I WILL MARK BRAINLIEST PLEASE HELP!
    11·1 answer
  • 1. A rectangle with length 9 cm and width 3 cm.<br> What’s the perimeter?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!