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4 years ago

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Mike paid 2.94 in sales tax on an item that cost $42 before tax at that rate how much would he pay in sales tax for an item that

cost $58 before tax

1 answer:

DiKsa [7]4 years ago

6 0

You want to divide the congruent of the molecular fusion to the conjecuative of the Pythagorean theorem

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The travel-to-work time for residents in Ventura County is unknown. Assume the population variance is 39. How large should a sam

katen-ka-za [31]

Answer:

A sample size of 128 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.93}{2} = 0.035$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.035 = 0.965$ , so $z = 1.81$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population(square root of the variance) and n is the size of the sample.

How large should a sample be if the margin of error is 1 minute for a 93% confidence interval

We need a sample size of n, which is found when $M = 1$ . We have that $\sigma = \sqrt{39}$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$1 = 1.81*\frac{\sqrt{39}}{\sqrt{n}}$

$\sqrt{n} = 1.81\sqrt{39}$

$(\sqrt{n})^2 = (1.81\sqrt{39})^2$

$n = 127.8$

Rounding up

A sample size of 128 is needed.

7 0

3 years ago

Solve the inequality. 2 < 6 - 3r and graph the solution

Vladimir79 [104]

the answer is 3 because you subtract 6 - 3 = 3r

6 0

3 years ago

I've been learning this but I don't remember how to find x?

KIM [24]

Answer:56 degrees

Step-by-step explanation: Using Base Angles Theorem, we can conclude that angle x is 180-62*2, which is 180-124, which is 56 degrees.

7 0

3 years ago

Read 2 more answers

A box of 12 Popsicles costs $4.44 what is the Popsicles unit rate

OLEGan [10]

The unit rate would be $0.37

4 0

3 years ago

Read 2 more answers

Maria creates a new board game. Her board game uses toothpicks as game pieces. Each board game requires 10

mestny [16]

Answer:

6 games

Step-by-step explanation:

The number of games can be found by determining the number of groups of 10 Maria can make.

62/10 = 6.2

Maria can make 6 groups of 10 and will have a fraction of a group left over. Maria will be able to put together 6 of her board games.

6 0

2 years ago