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
MAXImum [283]
3 years ago
11

Hannah can paint a room in 8 hours. Destiny can paint the same room in 6 hours. How long does it take for both Hannah and Destin

y to paint the room it they are working together?
Mathematics
1 answer:
Ksivusya [100]3 years ago
6 0

Answer:

3 hours 26 minutes

Step-by-step explanation:

1/8 + 1/6 = 1/t  where t is the required time in hours.

Multiply through by 24t:-

3t + 4t = 24

7t = 24

t = 3 3/7 hours

or  3 hours 26 minutes to the nearest minute.

You might be interested in
Number 7 and 8 plz answer quickly
Flauer [41]

(7) m∠A = 52°

(8) m∠B = 117°

Solution:

(7) Let us first define the supplementary and complementary angles.

Supplementary angles: Two angles are said to be supplementary angles if their sum is add up to 180°

Complementary angles: Two angles are said to be complementary angles if their sum is add up to 90°

Given supplement of 142° = 180° – 142°

                                           = 38°

Complement of ∠A = Supplement of 142°

⇒ Complement of ∠A = 38°

Measure of ∠A = 90° – 38°

                          = 52°

Hence m∠A = 52°.

(8) Given complement of 27° = 90° – 27°

                                                 = 63°

Supplement of ∠B = Complement of 27°

⇒ Supplement of ∠B = 63°

Measure of ∠B = 180° – 63°

                          = 117°

Hence m∠B = 117°.

3 0
3 years ago
Find the necessary confidence interval for the binomial proportion p. (Round your answers to three decimal places.) A 90% confid
frutty [35]

Answer:

[0.875;0.925]

Step-by-step explanation:

Hello!

You have a random sample of n= 400 from a binomial population with x= 358 success.

Your variable is distributed X~Bi(n;ρ)

Since the sample is large enough you can apply the Central Limit Teorem and approximate the distribution of the sample proportion to normal

^ρ≈N(ρ;(ρ(1-ρ))/n)

And the standarization is

Z= ^ρ-ρ  ≈N(0;1)

√(ρ(1-ρ)/n)

The formula to estimate the population proportion with a Confidence Interval is

[^ρ ± Z_{1-\alpha/2}*√(^ρ(1-^ρ)/n)]

The sample proportion is calculated with the following formula:

^ρ= x/n = 358/400 = 0.895 ≅ 0.90

And the Z-value is Z_{1-\alpha/2} = Z_{0.95} = 1.648 ≅ 1.65

[0.90 ± 1.65 * √((0.90*0.10)/400)]

[0.875;0.925]

I hope you have a SUPER day!

5 0
2 years ago
A theater company charges $4.50 per ticket for people of all age groups. If c represents the total number of children who bought
elena55 [62]

Answer:

4.50c

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
PLEEEEAAAAAAAASE HELP ME... CLASS IS TODAY AND I STILL HAVE ALL OF MY HW TO DO... I HAVE NO IDEA, PLEASE BE QUICK THANK SO MUCH!
maxonik [38]

Answer:

abc

Step-by-step explanation:

8 0
3 years ago
Olivia selects marbles from a bag containing 5 red and 7 blue marbles. Which of the following events are independent?
nikklg [1K]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • An 8 by 19 ft wall has three 4 by 5 windows. the area of the entire wall [including the windows]
    12·1 answer
  • Find the midpoint of the segment with endpoints of -2,-2 and 4,6
    9·1 answer
  • According to a study done by a university​ student, the probability a randomly selected individual will not cover his or her mou
    9·1 answer
  • Select all the equations where z=5z=5z, equals, 5 is a solution.
    5·1 answer
  • The diameter of a circle is 14 miles what is the circumference
    15·1 answer
  • In the scale used on a blueprint, 1/4 inch represents 3 feet. On the blueprint, what is the length of a room with an actual leng
    12·1 answer
  • The ice ages are an example of climate change.where else have you heard about climate change
    8·1 answer
  • A carpenter wants to expand a square room. The new room will have one side 4 feet longer and the adjacent side 6 feet longer tha
    12·1 answer
  • Maths<br> Lesson<br> 4 candies<br> cost<br> £3.60. Find the cost of 1 candle
    6·1 answer
  • I need help with this question
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!