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
Harrizon [31]
2 years ago
9

Can someone explain it to me please​

Mathematics
2 answers:
Pepsi [2]2 years ago
7 0

Answer:

4) 23.3

5.1) 22.2

5.2) 0.045

Step-by-step explanation:

4) minutes per worksheet = minutes/ worksheets

2 hours and 20 minutes = 120 minutes and 20 minutes = 140 minutes.

6 worksheets in total so:

140/6= 23.333.. (23.3 bar)

5) same thing

total km per total liter = total km divided by total liter= km/l

200/9= 22.22.. ( 22.2 bar)

5.2) same thing but opposite

total liter of total km= l/km = 9/200 = 0.045

Ksenya-84 [330]2 years ago
4 0

Answer:

  • Given Below

Step-by-step explanation:

4.

Johan completes 6 worksheets in 2 hours and 20 minutes.

6 worksheets ---> 2 hrs 20 minutes

6 worksheets ---> 140 minutes

1 worksheets ----> 140/6 minutes

1 worksheets ----> 23.33 minutes

He finishes 1 worksheet in 23.33 minutes

------------------------------------------------------------------------------------------

5.1

9 litres covers 200 km

1 litres covers (200/9) km

rate: \frac{200}{9} l/km or 22\frac{2}{9} km/l

5.2

200 km covered by 9 litres

1 km covered by (9/200) litres

rate: \frac{9}{200} l/km

You might be interested in
Find the balance at the end of 4 years if $10,000 is deposited at a rate of 1.5% simple interest.
Minchanka [31]

Answer:

Principal amount (P) = $10,000

Rate (R) = 1.5%

Time (T) = 4 years

Simple interest, I = P X R X T / 100

= 10000 X 1.5 X 4 /100

= 60000 / 100

= $600

Therefore, Balance = P + I

= 10000 + 600

= $10600

3 0
3 years ago
Suppose a particular type of cancer has a 0.9% incidence rate. Let D be the event that a person has this type of cancer, therefo
natita [175]

Answer:

There is a 12.13% probability that the person actually does have cancer.

Step-by-step explanation:

We have these following probabilities.

A 0.9% probability of a person having cancer

A 99.1% probability of a person not having cancer.

If a person has cancer, she has a 91% probability of being diagnosticated.

If a person does not have cancer, she has a 6% probability of being diagnosticated.

The question can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

P = \frac{P(B).P(A/B)}{P(A)}

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

In this problem we have the following question

What is the probability that the person has cancer, given that she was diagnosticated?

So

P(B) is the probability of the person having cancer, so P(B) = 0.009

P(A/B) is the probability that the person being diagnosticated, given that she has cancer. So P(A/B) = 0.91

P(A) is the probability of the person being diagnosticated. If she has cancer, there is a 91% probability that she was diagnosticard. There is also a 6% probability of a person without cancer being diagnosticated. So

P(A) = 0.009*0.91 + 0.06*0.991 = 0.06765

What is the probability that the person actually does have cancer?

P = \frac{P(B).P(A/B)}{P(A)} = \frac{0.91*0.009}{0.0675} = 0.1213

There is a 12.13% probability that the person actually does have cancer.

3 0
3 years ago
The difference of a number divided by 5 and 6 equals 2. <br><br> write equation
dusya [7]
(x/5)-6=2

It depends by difference of. Difference between is more specific. 



4 0
3 years ago
Read 2 more answers
For each of the following scenarios state whether H0 should be rejected or not. State any assumptions that you make beyond the i
scoundrel [369]

Answer:

a)H_0 :\mu = 4\\ H_1 : \mu \neq 4 , n = 15 , X=3.4 , S=1.5 , α = .05

Formula : t = \frac{x-\mu}{\frac{s}{\sqrt{n}}}

t = \frac{3.4-4}{\frac{1.5}{\sqrt{15}}}

t =-1.549

p- value = 0.607(using calculator)

α = .05

p- value > α

So, we failed to reject null hypothesis

b)H_0 :\mu = 21\\ H_1 : \mu < 21 , n =75 , X=20.12 , S=2.1 , α = .10

Formula : t = \frac{x-\mu}{\frac{s}{\sqrt{n}}}

t = \frac{20.12-21}{\frac{2.1}{\sqrt{75}}}

t =-3.6290

p- value = 0.000412(using calculator)

α = .1

p- value< α

So, we reject null hypothesis

(c) H_0 :\mu = 10\\ H_1 : \mu \neq 10, n = 36, p-value = 0.061.

Assume α = .05

p-value = 0.061.

p- value > α

So, we failed to reject null hypothesis

7 0
3 years ago
Find the length of the missing side of the perimeter is 30ft
Svetach [21]

Answer:

5ft

Step-by-step explanation:

7 + 10 + 8 = 25

subtract that form 30

25-30

Thane you get

5

so the answer is

5!!!!!

also plz mark me brainliest

4 0
2 years ago
Other questions:
  • 7x²=28 I'm not sure about how to do thus problem
    7·2 answers
  • The diameter of a circle is 10 meters. What is the area of the circle? (Use 3.14 for Pi and round to the nearest tenth.
    12·2 answers
  • PLZ HELP I WILL MARK BRAINLIEST!!!!given:TRIANGLE ABC,m FIND:m
    12·1 answer
  • Find the value of x
    14·1 answer
  • What’s the answer to 14 and 18?
    5·2 answers
  • I beg of you to help me I need to be able to graduate
    10·1 answer
  • Worked a total of
    15·1 answer
  • PLEASE HELP!!!!!! A sandbox in the shape of a rectangular prism measures 11 feet by 7.5 feet by 1.5 feet. Find the maximum amoun
    7·1 answer
  • There are 280 pieces of fruit in a fruit salad. There are twice as many raspberries as blueberries, three times as many grapes a
    12·1 answer
  • Wuts x im so confuseded 15 points uwu<br> −2/9x+2.7=4
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!