SOLUTION: It says to solve and write the answer in scientific notation. Can you please help? (9×10^-3)+(2.4×10^−5)÷0.0012

Algebra ->  Exponents -> SOLUTION: It says to solve and write the answer in scientific notation. Can you please help? (9×10^-3)+(2.4×10^−5)÷0.0012      Log On


   

Question 1138428: It says to solve and write the answer in scientific notation. Can you please help?
(9×10^-3)+(2.4×10^−5)÷0.0012
Found 2 solutions by Boreal, MathLover1:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Do the second and the third first
2.4 x 10^-5 or 2.4 E -5 (e for exponent)/1.2 E-3, put a decimal between the 1 and 2 and count back 3 to the left so that is 10^(-3) or E-3.
Then divided 2.4/1.2 or 2 and E-5 by E-3 which is E-2, make exponent positive when go across fraction.
so adding 9 E-3 to 2 E-2.
Adding in scientific notation is useful if they have the same exponent, not otherwise.
0.009+
0.02
0.029 ANSWER

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

To write in scientific notation, follow the form:
n%2A10%5Ea where n is a number between 1 and 10, but not 10 itself, and a is an integer (positive or negative number)


%289%2A10%5E-3%29%2B%282.4%2A10%5E-5%29%2F0.0012+........in case you have this
%289%2A10%5E-3%29%2B%282.4%2A10%5E-5%29%2F12%2A10%5E-4
%289%2A10%5E-3%29%2B%282.4%2A10%5E-5%2A10%5E4%29%2F12
9%2A10%5E-3%2B%282.4%2F12%29%2A10%5E%28-5%2B4%29
9%2A10%5E-3%2B0.2%2A10%5E%28-1%29
9%2F10%5E3%2B0.2%2F10
9%2F10%5E3%2B%280.2%2A10%5E2%29%2F%2810%2A10%5E2%29
9%2F10%5E3%2B20%2F10%5E3
29%2F1000....both numerator and denominator divide by 10
2.9%2F100
2.9%2A10%5E-2-> your answer