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Brut [27]
2 years ago
15

the original purchase price of a car is 12,000. Each year, its value depreciates (loses value) by 5%. Three years after its purc

hase, what is the value of the car?
Mathematics
2 answers:
Phoenix [80]2 years ago
8 0

Answer:

10,200

Step-by-step explanation:

klasskru [66]2 years ago
3 0

P(1-r)^n

r = decimal form of the interest rate percent

n = amount of years

principal times (1 - decimal form of the interest rate percent) to the (amount of years) power

12000 (1-.05)^3

use PEMDAS

12000 times (.95)^3

12000 times .857375 =

ANSWER:

10288.5

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A manufacturer of chocolate chips would like to know whether its bag filling machine works correctly at the 419 gram setting. It
Pachacha [2.7K]

Answer:

We reject the null hypothesis, and accept the alternative hypothesis.

So, it means that the machine is under filling the bags

Step-by-step explanation:

Given

Null Hypothesis

H_0:\mu = 419 --- works correctly at 419g

Alternate Hypothesis

H_0:\mu < 419 --- under fills the bag

n =15 --- the sample

\bar x = 409 --- the mean

\sigma = 22 --- the standard deviation

\alpha = 0.05 --- the significance level

Required

What is the decision rule

Since n is less than 30, we make use of t test

t = \frac{\bar x - \mu}{\sigma/\sqrt n}

t = \frac{409 - 419}{22/\sqrt{15}}

t = \frac{-10}{22/ 3.87}

t = \frac{-10}{5.58}

t = -1.792

Calculate df

df = n-1

df = 15-1

df = 14

Calculate the p value from the Student's t-distribution  at df = 14 and t = -1.792

p =0.047  

Given that: \alpha = 0.05

Since p < \alpha

So, it means that the machine is under filling the bags

6 0
3 years ago
If a is the mean and b is the median of nine consecutive integers, what is the value of |a - bl?
pshichka [43]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
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marishachu [46]

Answer:

1 1/5

Step-by-step explanation:

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i hope that made scene and i hope it helped

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Answer:

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Step-by-step explanation:

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