Answer:
n= -10
Step-by-step explanation:
50-20= 30 so -3n=30. So n= -10.
Expressions can be easily multiplied when written in scientific notation by:
1. First, multiplying the numbers other than the powers of 10.
2. Second, multiplying the powers of 10
And then, writing them as a product.
Let us take the general case first.
Multiplying two numbers x⋅10m and y⋅10n
First, multiplying the numbers other than the powers of 10, we get:
x⋅y=xy
Second, multiplying the powers of 10 we get
10m⋅10n=10m+n
And then writing them as a product, we get
xy⋅10m+n
Therefore, (x⋅10m)⋅(y⋅10n)=xy⋅10m+n
Note: When the bases of 2 numbers are equal, their powers can be added up!
Examples:
1). 2a⋅2b=2a+b
2) 33⋅37=33+7=310
Now, let's take some specific examples.
Q: Multiply 1.2⋅103 and 2.3⋅104
A:
(1.2⋅103)⋅(2.3⋅104)
=(1.2⋅2.3)⋅(103+4)
=2.76⋅107
Q: Multiply 9.32⋅1021 and 8.21⋅1032
A:
(9.32⋅1021)⋅(8.21⋅1032)
=(9.32⋅8.21)⋅(1021+32)
=76.5172⋅1053
Notice that this answer is not in the standard form. So, converting this into standard form, we get:
=7.65172⋅1054
Hope this helps
Have a good day!
Answer:
Step-by-step explanation:
=
−
±
2
−
4
√
2
x
=
−
b
±
b
2
−
4
a
c
2
a
x=2a−b±b2−4ac
Once in standard form, identify a, b, and c from the original equation and plug them into the quadratic formula.
2
−
2
+
1
0
=
0
x
2
−
2
x
+
10
=
0
x2−2x+10=0
=
1
a
=
1
a=1
=
−
2
b
=
−
2
b=−2
=
1
0
c
=
10
c=10
=
−
(
−
2
)
±
(
−
2
)
2
−
4
⋅
1
⋅
1
0
√
2
⋅
1
x
Answer:
It would be 490 or 108
Step-by-step explanation:
multiply the perimeter thats all
4.64 I think, correct me if I'm wrong :)