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ANEK [815]
2 years ago
8

Divide: 21 and 4,291,678

Mathematics
2 answers:
valentina_108 [34]2 years ago
5 0

Answer:

4.9x10⁻⁶

Step-by-step explanation:

21 / 4291678 = 4.9x10⁻⁶

Vilka [71]2 years ago
4 0

Answer: assuming you mean divide 4mil by 21, the answer is 204365.619

Step-by-step explanation:

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What is the length of the hypotenuse? If necessary, round to the nearest tenth.
Brut [27]

Answer:

c ≈ 5.5 cm

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

c² = 2.4² + 4.9² = 5.76 + 24.01 = 29.77 ( take square root of both sides )

c = \sqrt{29.77} ≈ 5.5 cm ( to the nearest tenth )

4 0
3 years ago
Read 2 more answers
PLZ HELP OR I FAIL MY TEST
Volgvan

Answer:

time upstream=24/8=3 hours

time downstream=24/12=2 hours

Step-by-step explanation:

If R*T=D, and R is speed + or - current, how can you find the rate without the time, and how can you find the time without the rate?

THE KEY WAS WHEN WE WERE TOLD THAT IT TAKES ONE HOUR LONGER TO GO UPSTREAM THAN DOWNSTREAM BECAUSE T=D/R AND WE ARE TOLD THAT:

D/R(Upstream) minus 1 equals D/R (DOWNSTREAM)



Let x=rate of current

distance(d)=rate(r) times time(t) or d=rt or t=d/r

distance upstream=distance downstream=24 mi

rate upstream=10-x

rate downstream=10+x

time upstream=(distance upstream)/(rate upstream)=24/(10-x)

time downstream=(distance downstream)/(rate downstream)=24/(10+x)

Now, we are told that time upstream minus one hour equals time downstream. So our equation to solve is:

24/(10-x)-1=24/(10+x) Multiply both sides by (10-x)(10+x)

24(10+x)(10-x)/(10-x)-1(10-x)(10+x)=24(10-x)/(10+x)/(10+x) clear fractions


24(10+x)-(10-x)(10+x)=24(10-x) clear parens

240+24x-100-10x+10x+x^2=240-24x subtract 240 from and add 24x to both sides

240-240+24x+24x-100+x^2=240-240-24x+24x collect like terms

x^2+48x-100=0 ----------------quadratic equation in standard form

This equation can be factored:

(x+50)(x-2)=0

x=-50 mph----------------discount the negative value for speed

and

x=2 mph----------------------speed of the current

CK

10-x=10-2= 8 mph -----------------------speed upstream

10+x=10+2=12 mph--------------------------speed downstream

time upstream=24/8=3 hours

time downstream=24/12=2 hours

so 3-2=1----takes 1 hour longer upstream

7 0
3 years ago
Please I need some help
laiz [17]
For the first question, all you need to know is that the (amount you want) divided by (the amount of cards total) is the probability of getting the amount you want at random. for example, if there are 3 red marbles in a bag of ten marbles, you divide 3 by 10 (0.30) the probability of picking up a red marble is 30%. try adding up how many cards you want to pick up by the number of cards total.
7 0
3 years ago
How many times does it intersect on the graph? y=x^2+3x-2, y-x=4
FrozenT [24]
It intersects twice :)

3 0
2 years ago
Help me please it's a quiz
lesya692 [45]

Answer:

8000in³

Step-by-step explanation:

20³=20*20*20=8000

7 0
2 years ago
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