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3 years ago

9

it takes three days for a snail to climb a wall. if a snail climds up the wall 2 in. in one day, then slids down 1 in. how tall

is the wall when the sail climbs to the top

1 answer:

kkurt [141]3 years ago

8 0

I believe the answer is 3 days.

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Consider the line y=-x-3.

kicyunya [14]

Answer:

perp: 1

y - 5 = x -6

y = x - 1

parallel: -1

y - 5 = -(x - 6)

y - 5 = -x + 6

y = -x + 11

4 0

3 years ago

Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. To find the total number of pencils and pens, Ralph eva

fredd [130]

Answer:

No, it's actually 100

Step-by-step explanation:

If you put brackets in the right places you'll see (3*20)+(4*10)=60+40=100

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3 years ago

Draw a cone with a height of 9 in. and a diameter of 4 in. Find the volume. Round to the nearest tenth

finlep [7]

Answer:

150.72

Step-by-step explanation: To do this you times the radius by squared then by pi, then fraction your height by the fraction 1/3.

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3 years ago

when you sign up for a movie service, you get three free months of movies. then you are charged $15 per month to rent movies. if

ankoles [38]

90 / 15 = 6 plus 3 free months = 9

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4 years ago

Randomly selected students participated in an experiment to test their ability to determine when one minute (or sixty seconds)

zalisa [80]

Answer: $(57.41,\ 62.19)$

Step-by-step explanation:

Given : Sample size : $n=40$

Sample mean : $\overline{x}=59.8\text{ seconds}$

Standard deviation : $\sigma =9.2\text{ seconds}$

Significance level : $\alpha=1-0.9=0.1$

Critical value : $z_{\alpha/2}=1.645$

Formula to find the confidence interval for population mean :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=59.8\pm(1.645)\dfrac{9.2}{\sqrt{40}}\\\\\approx59.8\pm2.39\\\\=(59.8-2.39,\ 59.8+2.39)\\\\=(57.41,\ 62.19)$

Hence, a 90% confidence interval estimate of the population mean of all students = $(57.41,\ 62.19)$

6 0

3 years ago