What is 39,800,000 in scientific notation? A. 3.98 x 10 B. 398 x 10 C. 3.98 x 10 D. 39.8 x 10
2 answers:
<u>Answer:</u>
- 3.98 x 10⁷
<u>Review:</u>
<em>What is scientific notation:</em><em> It is a number that is between 1-10 and is written in exponents.</em>
<u>Instruction: </u>
<em>We need to re-write the number "39,800,000" </em><em>that is between 1-10 and is written in exponents. </em>
<u>Solution:</u>
- => 39,800,000 = 398 x 10⁵
<em>This is still not in scientific notation form because</em><em> it is not between 1-10. </em><em>Let's simplify further.</em>
- => 398 x 10⁵ = 3.98 x 10⁵⁺²
- => 3.98 x 10⁷
<em>This is now in scientific notation form because it follows the 2 reasons to form a scientific notation.</em>
<u>Conclusion:</u>
Therefore, 3.98 x 10⁷ is the number in scientific notation.
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<em>first distance P(–2, 9), Q(7, –3) </em>
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<em>Answer= 15</em>
Answer: 8.76%
Step-by-step explanation:
The formula to find the simple interest is given by :-
, where P is the principal amount, r is rate of interest () in decimal and t is the time ( in years). (1)
Given : Justin deposited $2,000 into an account 5 years ago.
i.e. P = $2,000 , t= 5 years
He has just withdrawn $2,876. i.e. Future value = $2,876
Interest (I)=$2,876-$2,000=$876 [Subtract Principal value from Future value]
Substitute all the above values of P , t , and I in the formula (1) , we get
In percent ,
Hence, the rate of interest = 8.76%