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3 years ago

Please help me 20 points

Mathematics

2 answers:

Jobisdone [24]3 years ago

4 0

Answer is c. i think

svetlana [45]3 years ago

3 0

Answer is C............

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Write an equation that represents the

Schach [20]

Answer:

Our free fall calculator can find the velocity of a falling object and the height it ... accelerating by 9.80665 m/s (approximately equal to 32.17405 ft/s ) every second.

Step-by-step explanation:

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2 years ago

A school assembly had 70 students in attendance, and 90% of them were first-graders. How many first-graders were at the assembly

natulia [17]

Answer:

Step-by-step explanation:

Because, 100% of 70 would be 7. Now we have that number lets multiply it by 9 because of 90%. 9 x 7 = 63 first-graders

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2 years ago

A customer pays $1,100 in state taxes on a newly purchased car. What is the value of the car if state taxes are 8.9% of the valu

Ganezh [65]

The taxes are figured as follows: 0.089(value of car)

Here the taxes are 0.089(value of car) = $1100.

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3 years ago

In an effort to estimate the mean of amount spent per customer for dinner at a major Lawrence restaurant, data were collected fo

larisa86 [58]

Answer:

The 99% confidence interval for the population mean is 22.96 to 26.64

Step-by-step explanation:

Consider the provided information,

A sample of 49 customers. Assume a population standard deviation of $5. If the sample mean is $24.80,

The confidence interval if 99%.

Thus, 1-α=0.99

α=0.01

Now we need to determine $z_{\frac{\alpha}{2}}=z_{0.005}$

Now by using z score table we find that $z_{\frac{\alpha}{2}}=2.58$

The boundaries of the confidence interval are:

$\mu-z_{\frac{\alpha}{2}}\times \frac{\sigma}{\sqrt{n} }\\24.80-2.58\times \frac{5}{\sqrt{49}}=22.96\\\mu+z_{\frac{\alpha}{2}}\times \frac{\sigma}{\sqrt{n} }\\24.80+2.58\times \frac{5}{\sqrt{49}}=26.64$

Hence, the 99% confidence interval for the population mean is 22.96 to 26.64

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3 years ago

What is the constant of preportionallity in the equation y= 2.5x?

e-lub [12.9K]

Answer:

2.5

Step-by-step explanation:

$y = 2.5x \\equating \: it \: with \: y \: = kx \: where \: k \: is \: any \: \\ constant. \\ k = 2.5 \\$

Thus, constant of proportionality = 2.5

7 0

3 years ago