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Svet_ta [14]
3 years ago
6

A car is bought at the price of $45,000. The price decreases at the rate of .25 every year (t). Which equation matches this expo

nential model?
A)

f(t) = 45(.75)t

B)

f(t) = 45,000(.75)t

C)

f(t) = 75(45,000)t

D)

f(t) = (t)(.75)45,000
Mathematics
1 answer:
Solnce55 [7]3 years ago
7 0
B. f(t) = 45,000(.75)t
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The sum of 7-1 and 7-2 will be a rational number because sum of rational numbers is a rational numbers.

A rational number is a number which can be written in p/q form where q≠0.

We know that when two rational numbers is added then the sum is also a rational number. And when two rational numbers are subtracted then the difference is also a rational number.

So in the given question, lets study the term differently that is,

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Suppose you work in the quality assurance department of a chemical processing plant and it is your responsibility to ascertain w
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Answer:

48.668 ≤ μ ≤ 63.332

Step-by-step explanation:

Given the data:

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Calculating the sample mean and standard deviation using calculator to save computation time :

71, 45, 54, 75, 50, 49, 63, 55, 48, 50

m = 56 ; s = 10.25

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From t table : t(0.05/2 ; 9) = t(0.025, 9) = 2.262

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48.668 ≤ μ ≤ 63.332

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