Question

convert 2.7543 x 10^7 to standard notation.
27543000
question 4
convert 5.78 x 10^-5 to standard notation.
0000578
question 5
multiply (6.8×10^7)×(2.8×10^5)
to type an exponent use the caret (^) for example:
10 to the third power = 10^3

Explanation:

Step1: Convert $2.7543 \times 10^7$

Move decimal 7 places right: $2.7543
ightarrow 27543000$

Step2: Convert $5.78 \times 10^{-5}$

Move decimal 5 places left: $5.78
ightarrow 0.0000578$

Step3: Multiply $(6.8 \times 10^7) \times (2.8 \times 10^5)$

Multiply coefficients: $6.8 \times 2.8 = 19.04$
Add exponents: $10^{7+5}=10^{12}$
Rewrite in proper form: $1.904 \times 10^{13}$

Answer:

1. $27543000$
2. $0.0000578$
3. $1.904×10^13$