I need help with these questions please ASAP!!!!!!

Mathematics

2 answers:

Effectus [21]3 years ago

7 0

Answer:

Your answers are 1.A 2.T 3.C 4.A

leonid [27]3 years ago

5 0

Read it #1 would be A. Read it #2 would be False. Read it #3 would be D (not sure on that one) and Read it #4 would be A

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Beth purchased a computer, and its value depreciated exponentially each year. Beth will sketch a graph of the situation, where x

Katyanochek1 [597]

What is x?

It is the number of years since purchase. Can this be negative?

NO! Years cannot be negative. So we disregard negative x-axis.

What is y?

It is the value of the computer at that year. A computer starts off with a positive value (y axis) and depreciates to 0 after some years. Can this be negative?

NO! At 0 value, the computer is worth nothing! There is nothing known as <em>negative </em>value. So we disregard negative y-axis.

The graph that Beth will sketch will have to be in the 1st quadrant (positive x-axis & positive y-axis).

ANSWER: Quadrant I only

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3 years ago

Does this graph represent a function? Why or why not?

bija089 [108]

D. No x value has more than one y value so it's a function.

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2 years ago

Read 2 more answers

A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained i

Scorpion4ik [409]

Answer:

a) We need a sample size of at least 3109.

b) We need a sample size of at least 4145.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.