Answer:
C. 5x^2 - 8x + 13
Step-by-step explanation:
By using scientific notation we calculated (2.3
10⁵)(1.5
10⁴) we got 345
10⁷.
Given that,
(2.3
10⁵)(1.5
10⁴)
By using scientific notation
The scientific notation allows us to express extremely large or extremely small numbers by multiplying them by single-digit integers and by 10 raised to the power of the corresponding exponent. The exponent is either positive or negative depending on how big or little the number is.
Now, we calculate
(2.3
10⁵)=2.5
100000=230000
(1.5
10⁴)=1.5
10000=15000
Now,
=230000
15000
=3450000000
=345
10⁷
Therefore, By using scientific notation we calculated (2.3
10⁵)(1.5
10⁴) we got 345
10⁷.
To learn more about scientific notation visit: brainly.com/question/18073768
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A
Working:
Tan(angle)=opposite/adjacent
Tan60 = x/7root3
x=7root3 x Tan60
Enter in calculator
x=21
For example if we have 7/10 we have one 0 in the denominator so we move the decimal spot 1 to the left
So:
7.0 becomes 0.70 or .7
To make a decimal into a fraction:
0.32
Just add two zeros to the right and that means 2 0's will be added in the denominator
so:
0.32
32.0/100 or 32/100
Hope that helps :)