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
lions [1.4K]
3 years ago
7

You clean a community park for 6.5 hours. You earn $42.25. How much do you earn per hour?

Mathematics
1 answer:
padilas [110]3 years ago
5 0
6.5 hours is equal to:

60 mins x 6 + 30 mins = 390 mins

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

42.25 / 390 = 13/120

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

Now there are 60 minutes in an hour, so what we do is multiply 13/120 by 60 to find out how much you earn per hour...

13/120 x 60 = 6.5

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

You earn $6.50 per hour.
You might be interested in
5. Describe the pattern below.<br> 9, 12, 15, 18, 21, 24
Dafna11 [192]

Answer:

The numbers increase by 3

Step-by-step explanation:

The difference between all the numbers in the sequence have a gap of 3

9 and 12 --gap of 3

12 and 15--gap of 3

18 and 21--gap of 3

21 and 24--gap of 3

6 0
2 years ago
Read 2 more answers
Determine whether the cost for ordering multiple items that will be delivered is sometimes, always or never proportional. Explai
Tanzania [10]
It could sometimes be proportional. The reasoning here is that if all the items have different prices it won't be, however if the items you are ordering all have the same price they will be!
5 0
3 years ago
The lifespan (in days) of the common housefly is best modeled using a normal curve having mean 22 days and standard deviation 5.
Natasha_Volkova [10]

Answer:

Yes, it would be unusual.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If Z \leq -2 or Z \geq 2, the outcome X is considered unusual.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question, we have that:

\mu = 22, \sigma = 5, n = 25, s = \frac{5}{\sqrt{25}} = 1

Would it be unusual for this sample mean to be less than 19 days?

We have to find Z when X = 19. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{19 - 22}{1}

Z = -3

Z = -3 \leq -2, so yes, the sample mean being less than 19 days would be considered an unusual outcome.

7 0
2 years ago
1) Jayden runs 1/4 of a mile in 1/4 of an hour. How far will it take him to run 1hr.
Masja [62]

Answer:

Question 1 : If you mean how many miles will he run in 1 hour then it is 1 Mile | Question 2 : 2 Miles

Step-by-step explanation:

Question 1 :

1/4 x 4 (because of the hour being split into fourths) = 1 Mile

Question 2 :

120 / 20 = 6, 6 x 1/3 = 6/3, simplified = 2

5 0
2 years ago
How to solve quadratic equations
eduard
If we have two numbers A&B and we know that A times B=0  then it must follow that either A=0, or B=0 (or both) 
8 0
2 years ago
Other questions:
  • Let f(x)=8/(1+3e)^(-0.7x)
    14·1 answer
  • 2 3/4 qt = how many pt
    7·1 answer
  • Please help thx :)))
    8·2 answers
  • At a pet store, Davina counted 12 parrots out of 20 birds. Which is an equivalent ratio of parrots to birds at the pet store?
    7·2 answers
  • Tina’s rectangular living-room floor measures 15 feet by 18 feet. a. How many square feet of carpet will Tina need to cover the
    6·2 answers
  • Factor 8x squared + 22x + 15
    10·1 answer
  • What is the graph of the inequality 3x+2y&gt;-5
    11·1 answer
  • F(n)=2n+1<br> g(n)=3n<br> Find f(n)+g(n)
    14·1 answer
  • Drag each function to the correct location on the chart. Classify the functions as continuous and discontinuous functions. If a
    11·1 answer
  • BOOKMARK
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!