MATHEMATICS HIGH SCHOOL

I need these answers ASAP

Answers

Answer 1

Answer:

Answer:

irratrrational Numbers

whole

real

Step-by-step explanation:

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About how many molecules of water are in a swimming pool that holds 200 m^3 of water ? Write your answer in scientific notation . Please , I need your help !

Answers

metric is very conveinient
1gram=1cm^3 of water
1m^3=1,000,000,000 grams

water is 18.015 grams per mole
(1,000,000 grams water)/(18.015 grams/mole) = 55509.3 moles

there are 6.02e23 molecules in 1 mole of water so
55509.3 moles * (6.0221E23) = 3.3428E27 molecules of water in 1m^3 of water
so we have200 of those
200 times 3.3428E27=6.6856E29 molecules

answer is 6.6856 times 10^29 mlecules

What is one third plus one fourth and what is 1/3 + 1/2

Answers

$(1)/(3)+(1)/(4)=(4)/(12)+(3)/(12)=(7)/(12)\n \n \n(1)/(3)+(1)/(2)=(2)/(6)+(3)/(6)=(5)/(6)$

1/3+1/2=5/6
and 1/4+1/3=7/12

If a plane travels 300 mph, how many miles will it travel in 18 min?

Answers

The plane travelling at a speed of 300 mph will travel 90 miles in 18 minutes.

What is unit rate?

A unit rate means a rate for one of something. We write this as a ratio with a denominator of one. For example, if you ran 70 yards in 10 seconds, you ran on average 7 yards in 1 second. Both of the ratios, 70 yards in 10 seconds and 7 yards in 1 second, are rates, but the 7 yards in 1 second is a unit rate.

Given that, a plane travels 300 mph,

That means, its unit rate is 300 mph

Therefore, in 60 minutes it will travel 300 miles

Therefore, in 1 minute it will travel = 300 / 60 = 5 miles

Thus, in 18 minutes it will travel = 5 x 18 = 90 miles

Hence, the plane travelling at a speed of 300 mph will travel 90 miles in 18 minutes.

Learn more about unit rates, click;

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Answer:

6 hours.

Step-by-step explanation:

1800/300. time =distance / rate

Four classmates were asked to decorate one fifth of the bulletin board in a classroom. They divided the section to be decorated equally among 4 classmates. What fraction of the entire bulletin board did each classmate decorate