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
Alexxx [7]
3 years ago
12

Devin has -$3.20 in his bank account and then deposits $15.00. What is Devin’s new bank account balance?

Mathematics
1 answer:
Vinvika [58]3 years ago
4 0

Answer:$18.20

Step-by-step explanation: deposit means to put in, so you would subtract -$3.20 by $15 to get $18.20, which is his new balance.

You might be interested in
Which of these shapes have rectangular cross sections when they are cut perpendicular to the base? Check all that apply.
mezya [45]
Rectangular prism...becuase it is in rectangular shape..no matter how you cut it..it will give u a rectangle
6 0
3 years ago
The mean points obtained in an aptitude examination is 159 points with a standard deviation of 13 points. What is the probabilit
Korolek [52]

Answer:

0.4514 = 45.14% probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled

Step-by-step explanation:

To solve this question, we have 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.

Central limit theorem:

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

In this problem, we have that:

\mu = 159, \sigma = 13, n = 60, s = \frac{13}{\sqrt{60}} = 1.68

What is the probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled?

This is the pvalue of Z when X = 159+1 = 160 subtracted by the pvalue of Z when X = 159-1 = 158. So

X = 160

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

By the Central Limit Theorem

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

Z = \frac{160 - 159}{1.68}

Z = 0.6

Z = 0.6 has a pvalue of 0.7257

X = 150

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

Z = \frac{158 - 159}{1.68}

Z = -0.6

Z = -0.6 has a pvalue of 0.2743

0.7257 - 0.2743 = 0.4514

0.4514 = 45.14% probability that the mean of the sample would differ from the population mean by less than 1 point if 60 exams are sampled

7 0
3 years ago
Find an equivalent expression to 2x/3xy
mariarad [96]
X(2/3y)
factor out an x on both numerator and denominator
5 0
2 years ago
If the trapezoid is moved, then what will the coordinates of B be​
Vesnalui [34]

Answer:

-1,1

Step-by-step explanation:

6 0
3 years ago
The radius of the water well is 9 inches. Find the area of the water well
leva [86]

Answer:

A=254.34

Step-by-step explanation:

1. A=πr²

2. A=π(9)²

3. A=π(81)

4. A=3.14(81)

5. A=254.34

8 0
3 years ago
Read 2 more answers
Other questions:
  • How are arithmetic and geometric sequences similar?
    11·1 answer
  • What expression is equivalent to 2^6 times 2^-4/ 2^7
    6·1 answer
  • Which rule represents an inverse variation?
    14·1 answer
  • tom had a platter of chocolate wafers. he ate 5 of them and then gave his brother 3 he then moved on to his baseball team of 8 m
    14·1 answer
  • Hey need help step by step please✋
    11·1 answer
  • The mean waiting time at the drive-through of a fast-food restaurant from the time the food is ordered to when it is received is
    12·1 answer
  • To factor 9x^2-16 you can first rewrite the expression as:
    15·1 answer
  • This data set gives the scores of 41 students on a biology exam: {66, 67, 67, 68, 80, 81, 81, 82, 22, 65, 66, 68, 69, 70, 71, 71
    10·2 answers
  • Will give brainliest! please answer correctly!
    6·1 answer
  • Find the missing section. Answers must be in fraction form.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!