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Paul [167]
11 months ago
11

Express this number in scientific notation.

Mathematics
1 answer:
xxTIMURxx [149]11 months ago
8 0

Answer:

6.21 × 10⁵

Step-by-step explanation:

move thee decimal from .21000 thats how you get 5

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Answer:

30 years: 1.38

45 years: 2.07

65 years:2.99

Step-by-step explanation:

$1x0.046=0.046

0.046x30=1.38

0.046x45=2.07

0.046x65=2.99

this is assuming that it gets interest yearly and that they don't want the original amount included.

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3 years ago
I really need help with this problem steps
melamori03 [73]
Solve for y by setting one equation =to X after that you can substitute the equation into the other one let's set the first one in X= FORM
X-7y=10
-2x+14y=-20

Add 7y to both sides of the first equation to let x stand alone
X=7y+10
Now you can substitute x on the second equation
-2 (7y+10)+14y=-20
Distribute
-14y-20+14y=-20
Add and simplify
Us cancel out =0
-20=-20
0=0
They are the same equations you can also divide the second equation by -2 which would make it look like this
X-7y=10
-2 (x-7y=10)
Let me know if I have answered your question
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What is 4.5(-20)+18=
Vikki [24]

Answer:

-72

Step-by-step explanation:

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