Read these lines from "Harlem [2]."

I need answers for both questions thank you

Basile [38]

Answer:

Some math problems require an exact answer, while for others, an approximate answer is good enough.

When a problem involves measurement of a real-world quantity, there is always some level of approximation happening. For example, consider two different problems involving measures of time. If the problem involves sprinters running the 100100 -meter dash, you will need to use precise measurements: hundredths of a second or better. If the problem involves people’s ages, it’s usually enough to approximate to the nearest year.

Sometimes when a problem involves square roots or other irrational numbers like pi , or even a complicated fraction, it’s useful to use decimal approximations—at least at the end, when you’re reporting your answer.

Example 1:

Deanna is making a wire fence for her garden in the shape below. Find the length of the hypotenuse of the triangle in meters.

Using the Pythagorean Theorem, we get:

x2=32+72x2=9+49x=56−−√x2=32+72x2=9+49x=56

So the hypotenuse is 56−−√56 meters long. That’s the exact answer. But having the answer in this format isn’t very useful if we’re trying to build something. How do you cut a piece of wire 56−−√56 m long?

A good calculator will tell you the value of 56−−√56 correct to 3030 decimal places:

56−−√≈7.48331477354788277116749746463356≈7.483314773547882771167497464633

Even this is an approximation. But it’s a much better approximation that you need. In this case, rounding the value to the nearest centimeter (hundredth of a meter) is probably enough.

56−−√=7.4856=7.48

The accuracy of a measurement or approximation is the degree of closeness to the exact value. The error is the difference between the approximation and the exact value.

When you’re working on multi-step problems, you have to be careful with approximations. Sometimes, an error that is acceptable at one step can get multiplied into a larger error by the end.

Example 2:

A plastic disk is the shape of a circle exactly 1111 inches in diameter. Find the combined area of 10,00010,000 such disks.

Suppose you use 3.143.14 as an approximation for ππ . Using the formula for the area of a circle, we get the area of one disk as:

A=πr2=π⋅112=121π≈121(3.14)=379.94A=πr2=π⋅112=121π≈121(3.14)=379.94

Multiply this value by 10,00010,000 to get the combined area of 10,00010,000 disks.

379.94×10,000=3,799,400379.94×10,000=3,799,400

This gives an answer of 3,799,4003,799,400 square inches. But wait!

See what happens when we use a more accurate value for ππ like 3.14163.1416 :

6 0

3 years ago

The key to improving your reading speed using eye focus or a finger guide is to

gogolik [260]

Answer:

use them together each time

Explanation:

.....

7 0

3 years ago

SET is to DISHES as CANTEEN is to ................... Please try and help me

Kruka [31]

As canteen is to food

4 0

3 years ago

Write 9 simple, compound, or complex sentences about your favorite foods using simple present tense.

olchik [2.2K]

Answer:

9 sentences using the simple present tense:

Positive statements-

I like chicken.

I make good chicken curry.

I eat fruits a lot.

Negative statements-

I don't like making fruit salads.

I don't buy a lot of mangoes.

I don't find fresh fruits.

Questions-

Do I like buying fresh fruits?

Can I eat fruits at all times?

Can I have fruits once a day?

9 sentences in the simple past tense:

Positive statements-

I liked chicken.

I made good chicken curry.

I ate fruits a lot.

Negative statements-

I didn't like making fruit salads.

I didn't buy a lot of mangoes.

I didn't find fresh fruits.

Questions-

Did I like buying fresh fruits?

Could I have eaten fruits at all times?

Could I have had fruits once a day?

9 sentences in the simple future tense:

Positive statements-

I will like chicken.

I will make good chicken curry.

I will eat fruits a lot.

Negative statements-

I will not like making fruit salads.

I will not buy a lot of mangoes.

I will not find fresh fruits.

Questions-

Will I like to buy fresh fruits?

Will I eat fruits at all times?

Will I have fruits once a day?

Explanation:

A simple present tense is a tense form in the present, the action happening in the present. Simple past tense talks about events in the past while the future tense talks of events that will happen in the future.

Positive statements are statements that state a positive expression while negative sentences have the "not" form, relaying a negative emotion. And questions pose a question using question words and also the question mark "?" at the end of the sentence.

The required sentences are-

9 sentences using the simple present tense:

Positive statements-

I like chicken.

I make good chicken curry.

I eat fruits a lot.

Negative statements-

I don't like making fruit salads.

I don't buy a lot of mangoes.

I don't find fresh fruits.

Questions-

Do I like buying fresh fruits?

Can I eat fruits at all times?

Can I have fruits once a day?

9 sentences in the simple past tense:

Positive statements-

I liked chicken.

I made good chicken curry.

I ate fruits a lot.

Negative statements-

I didn't like making fruit salads.

I didn't buy a lot of mangoes.

I didn't find fresh fruits.

Questions-

Did I like buying fresh fruits?

Could I have eaten fruits at all times?

Could I have had fruits once a day?

9 sentences in the simple future tense:

Positive statements-

I will like chicken.

I will make good chicken curry.

I will eat fruits a lot.

Negative statements-

I will not like making fruit salads.

I will not buy a lot of mangoes.

I will not find fresh fruits.

Questions-

Will I like to buy fresh fruits?

Will I eat fruits at all times?

Will I have fruits once a day?

5 0

3 years ago

When you first approach a text, you should...

sveta [45]

Scan/skim it to find out what it is about. Hope I helped! :)

3 0

4 years ago