All categories

2 years ago

Determine the kinetic energy of a 1000 kg roller coaster car that is moving with a speed of 20.0 m/s

Mathematics

1 answer:

Vedmedyk [2.9K]2 years ago

3 0

KE = 0.5*m*v2 KE = (0.5) * (1000 kg) * (20 m/s)2

You might be interested in

Hii please help i’ll give brainliest

BlackZzzverrR [31]

Answer:

3rd one

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

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

3 0

3 years ago

Need help due in 3 minutes!!!!

Yanka [14]

Answer:

ENQEU

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

How to solve -c(11c + 4)

saul85 [17]

Answer:

-11 $c^{2}$ - 4c

Step-by-step explanation:

You have to distribute the -c to both of the numbers in the parentheses, so the eleven would become negative, and c multiplied by c is c squared. The positive 4 becomes negative 4, and 4 times c is 4c. Hope that helps!

8 0

3 years ago

Read 2 more answers

The equation y=2(x-1)^2-5y=2(x−1)

marin [14]

Answer:

(b) It is symmetrical about $x = 1$