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2 years ago

Brainliest guaranteed Explain how to estimate the length of an object

Mathematics

2 answers:

Yakvenalex [24]2 years ago

5 0

Answer:

Step-by-step explanation:

To measure something accurately you should use standard units

You should use different units for different lengths:

millimetres (mm) are good for very small lengths - like the width of a pencil or your finger

centimetres (cm) are good for something a bit longer - like the length of a pencil or a book

metres (m) are good for something even longer - like the width of a room or the length of building

kilometres (km) are good for longer distances - like the distance between home and school, or between different towns

You should use proper instruments to measure accurately, like a ruler, tape measure, metre stick or trundle wheel.

tino4ka555 [31]2 years ago

3 0

Answer:

Step-by-step explanation:

for short lengths try your hand span.

for something a bit longer try using the length of your feet.

for something even longer try using your arm span or steps.

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Which expressions are equivalent to 2 (three-fourths x 7) minus 3 (one-half x minus 5)? Check all that apply. -1 29 2 (three-fou

Otrada [13]

The expression is equivalent to $\rm2( \dfrac{3}{4}x) + 2(7) -3(\dfrac{1}{2}x) + (-3) (-5)\\$ .

<h2 /><h2>Given that</h2>

Expression; $\rm 2(\dfrac{3}{4}x+7) -3(\dfrac{1}{2}x-5)$

<h3>We have to determine</h3>

Which expressions are equivalent to the given expression.

<h3>According to the question</h3>

Expression; $\rm 2(\dfrac{3}{4}x+7) -3(\dfrac{1}{2}x-5)$

To solve the given expression follow all the steps given below.

By applying the distributive property of multiplication;

$\rm a(b+c) = ab+ac$

Then,

The equivalent expression is,

$\rm 2(\dfrac{3}{4}x+7) -3(\dfrac{1}{2}x-5)\\
\\
\rm (2 \times \dfrac{3}{4}x) + 2(7) -3(\dfrac{1}{2}x) + (-3) (-5)\\
\\
2( \dfrac{3}{4}x) + 2(7) -3(\dfrac{1}{2}x) + (-3) (-5)\\$

Hence, the expression is equivalent to $\rm2( \dfrac{3}{4}x) + 2(7) -3(\dfrac{1}{2}x) + (-3) (-5)\\$ .

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2 years ago

A grocery store produce manager is told by a wholesaler that the apples in a large shipment have a mean weight of 6 ounces and a

Andru [333]

Answer:

W= 5.744

Step-by-step explanation:

given that a grocery store produce manager is told by a wholesaler that the apples in a large shipment have a mean weight of 6 ounces and a standard deviation of 1.4 ounces

Sample size n= 49

Margin of error = 0.10 (10% risk )

Let us assume X no of apples having mean weight of 6 oz is N(6,1.4)

Then sample mean will be normal with (6, 1.4/7) = (6,0.2)

(Because sample mean follows normal with std error as std dev /sqrt of sample size)

Now required probability <0.10

i.e. $P(\bar X$