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2 years ago

Sam mows a ¼ of a lawn in ½ of an hour. At this rate, how long will it take him to finish one lawn?

2 answers:

5 0

2 hours if he mows 1/4 im 1/2 then 2/4 would be 1 hour then 3/4 would be 1 1/2 hour then 4/4 would be 2 hours so ur answer is 2 hours

Scorpion4ik [409]2 years ago

4 0

Answer:

Two hours

Step-by-step explanation:

1/4 = 1/2

2/4 = 1

3/4 = 1 1/2

4/4 = 2

You might be interested in

What is the volume of the square pyramid with base edges 4 m and height 3 m

olya-2409 [2.1K]

16 m³

Step-by-step explanation:

Step 1:

Here we are going to find the volume of square pyramid.

Volume of square pyramid = $(1/3)$ × $(Base)^{2}$ × $(Height)$

Here base = 4 m

Height = 3 m

Step 2:

Volume = (1/3) × (4 × 4) × 3

= 16 m³

5 0

2 years ago

A company that manufactures toy trains is making a new boxcar. To fit on the track, the smallest dimension of the toy boxcar mus

pochemuha

Answer:

Length = 12 inches, height = 3 inches

Step-by-step explanation:

First, you have to set up a proportion. 2/7, x/42.

Then, you cross multiply and get the setup of 84=7x

Finally, you divide 84 by 7 and get 12.

12 is the length, and there is no other answer that has 12 in the height. You could just do the same proportion to get 3, though.

8 0

3 years ago

Read 2 more answers

And can you plz explain it to me

Grace [21]

It's the one on the bottom left that says 5ft and 3ft, they're the same shape and ratio just turned around. It's also the square that says 6ft and 10ft because its only two times bigger than the original and has similar proportions.

7 0

2 years ago

Read 2 more answers

Please help me get the answer and understand it.

oee [108]

Answer:

I believe d

Step-by-step explanation:

3 0

3 years ago

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A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were de

olga2289 [7]

Answer:

Se=1.2

Step-by-step explanation:

The standard error is the standard deviation of a sample population. "It measures the accuracy with which a sample represents a population".

The central limit theorem (CLT) states "that the distribution of sample means approximates a normal distribution, as the sample size becomes larger, assuming that all samples are identical in size, and regardless of the population distribution shape"

The sample mean is defined as:

$\bar X =\frac{\sum_{i=1}^n x_i}{n}$

And the distribution for the sample mean is given by:

$\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})$

Let X denotes the random variable that measures the particular characteristic of interest. Let, X1, X2, …, Xn be the values of the random variable for the n units of the sample.

As the sample size is large,(>30) it can be assumed that the distribution is normal. The standard error of the sample mean X bar is given by:

$Se=\frac{\sigma}{\sqrt{n}}$

If we replace the values given we have:

$Se=\frac{12}{\sqrt{100}}=1.2$

So then the distribution for the sample mean $\bar X$ is:

$\bar X \sim N(\mu=80,Se=1.2)$

5 0

2 years ago