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3 years ago

What is 0.000345 expressed in scientific notation? 3.45 × 102 3.45 × 104 3.45 × 10–2 3.45 × 10–4 its science btw

Mathematics

2 answers:

8_murik_8 [283]3 years ago

7 0

Answer:

3.45 × 10^–4

Step-by-step explanation:

rjkz [21]3 years ago

3 0

Answer:

The answer is D

Step-by-step explanation:

Hope I helped!

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Crawling Crayfish!

boyakko [2]

Answer: Crayfish, 25 s

Step-by-step explanation:

Given

The length of race is 60 cm

Flicker gets a 10 cm head-start

Cray fish covers 6 cm in 5 s i.e. its speed is

$\Rightarrow \dfrac{6}{5}=1.2\ cm/s$

Flicker covers 4 cm in 5 s, its speed is

$\Rightarrow \dfrac{4}{5}=0.8\ cm/s$

Time taken by Cray fish to cover the race is

$\Rightarrow t_1=\dfrac{60}{1.2}\\\\\Rightarrow t_1=50\ s$

Time taken by flicker to cover race with 10 cm head start

$\Rightarrow t_2=\dfrac{60-10}{0.8}\\\\\Rightarrow t_2=62.5\ s$

Time taken by crayfish is less. Hence, crayfish wins the race

When they both covers the same distance, they tied momentarily i.e.

$\Rightarrow 1.2t=10+0.8t\\\Rightarrow 0.4t=10\\\\\Rightarrow t=\dfrac{10}{0.4}\\\\\Rightarrow t=25\ s$

After 25 s, they tied the race.

5 0

3 years ago

If 9 out of 20 candies are orange, how many orange candies will there be per 100 candies total?

avanturin [10]

Answer:

Step-by-step explanation:

20 / 9 = 2.222222222223

100 / 45 = 2.222222222223

9 is 45% of 20 and 45 is 45% of 100.

5 0

2 years ago

Please help this is due and i only got the second part done

Ainat [17]

Answer:2n+13=75 n=31

8 0

3 years ago

Days 1,2,3,4 cost to rent a truck 29,47,65,83

wlad13 [49]

Answer: It cost 8$ for the truck

Step-by-step explanation:

6 0

2 years ago

Examine each number. What number can you add to this number to make a number that has a whole-number square root?

Fantom [35]

the answer is 470

Step-by-step explanation:Because 470+470 which equals 940 and the square root is 30

3 0

3 years ago