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
FromTheMoon [43]
3 years ago
9

You pawn a guitar and receive $880. One month later, you get the guitar back by paying $1250. If this is simple interest, then w

hat annual interest rate did you pay?
Mathematics
1 answer:
Lemur [1.5K]3 years ago
6 0
Interest=1250-880=370
I=PRT
P=principal
r=rate in deicmal
t=time in years

1 month so t=1/12
P=880
I=370

370=880*r*1/12
370=220/3r
times both sides by 3
1110=220r
divdie both sides by 220
5.04545=r
505% interest
You might be interested in
If 3t-7= 5 then 6t =
Musya8 [376]
3t=7+5=12
3t=12
t=4
6t=6×4=24
The answer is 24
3 0
3 years ago
PLEASE HELP!!!!<br><br>A. Y=|x+4|+2<br><br>B. y=|x-4|+2<br><br>C. y=|x+4|-2<br><br>D. y=|x-4|-2
Pani-rosa [81]
The answer is <span>C. y=|x+4|-2</span>
3 0
3 years ago
F(x) = –x^2– 10<br> Find f(-4)
Maksim231197 [3]
The answer would be -26
-(-4)^2-10
-4 squared is 16 times -1 is -16
-16-10
-26
6 0
3 years ago
Bottles filled by a certain machine are supposed to contain 12 oz of liquid. In fact the fill volume is random with mean 12.01 o
stepan [7]

Answer:

27.43% probability that the mean volume of a random sample of 144 bottles is less than 12 oz.

Step-by-step explanation:

To solve this problem, it is important 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 = 12.01, \sigma = 0.2, n = 144, s = \frac{0.2}{\sqrt{144}} = 0.0167

What is the probability that the mean volume of a random sample of 144 bottles is less than 12 oz

This is the pvalue of Z when X = 12

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

By the Central Limit Theorem

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

Z = \frac{12 - 12.01}{0.0167}

Z = -0.6

Z = -0.6 has a pvalue of 0.2743.

So there is a 27.43% probability that the mean volume of a random sample of 144 bottles is less than 12 oz.

4 0
3 years ago
How do you solve 1/4(b-8)^2=7?
d1i1m1o1n [39]
1/4 (b - 8)^2 = 7\\(b - 8)^2 = 7 \times 4 = 28\\b - 8 = \sqrt{28}=2\sqrt{7}\\b = 8+2\sqrt{7}
4 0
3 years ago
Other questions:
  • Calculate the Rate of Return on an initial investment of $6,000 valued at $6,500.
    13·2 answers
  • Solve for x 3x + 2 y;y=
    6·2 answers
  • Geometry question..can anyone help?
    14·1 answer
  • The following is an example of what type of sequence? 3, 11, 19, 27, 35…
    13·1 answer
  • Your class hopes to collect at least 325 cans of food for the annual food drive. There were 132 cans donated the first week and
    11·1 answer
  • An SUV costs $25,000. Their is 3% tax. How much will the SUV costs with tax?
    12·2 answers
  • Whats the slope form?
    9·1 answer
  • HELP I NEED A ANSWER ASAP
    7·1 answer
  • Ashley has finished 7/25 of her homework what percentage of the homework does Ashley still need to finish
    6·2 answers
  • Pleaseeeeee helpppppp
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!