(1.7 x 10^-4)(5 x 10^-5)
A)8.5 10^-9
B)8.5-10^20
C)6.7.10^-9
D)6.7-10^20
To multiply numbers written in scientific notation, we first multiply their coefficients and then add their exponents. Therefore:
(1.7 x 10^-4)(5 x 10^-5) = (1.7 x 5) x 10^-4 x 10^-5 = 8.5 x 10^-9
So the answer is A) 8.5 10^-9.
To multiply two numbers expressed in scientific notation, you need to multiply their coefficients and add their exponents.
The given numbers are (1.7 x 10^-4) and (5 x 10^-5).
Step 1: Multiply the coefficients: 1.7 x 5 = 8.5.
Step 2: Add the exponents: -4 + -5 = -9.
Therefore, the answer is 8.5 x 10^-9.
So, the correct option is A) 8.5 x 10^-9.