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2 answers:
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Hello there!
amd
Let me start with 8^-2
8^-2 = 1/8 * 8
8^-2 = 1/64
which equals to 0.015625 in decimal
8^ 0 = 1
Yep, that's the answer! Easy, isn't? Well you may have been wondering why 8^0 is equal to 1.
I quoted an explanation online that says: Think of "multiplication" as always including an extra "1" as a multiplier.
So it'd be like
8^ 0
8/8 = 1
Remember: Whenever a number has an exponent 0, the answer MUST be 1.
Thus,
8^0 is greater. As you can see, it is equal to 1, while the other one is equal to 0.01
I'm terrible at explaining stuff. I hope you find this answer somehow helpful :)
We want to multiply 
by 
.
The numbers are written in scientific notation. So we expect the answer also to be in scientific notation.
the multiplication of the 10's, using the exponents rule is :
the multiplication of the other 2 numbers is:
(we write the number so that it has only one digit to the left of the decimal point).
Thus,
Answer:
The numbers are written in scientific notation. So we expect the answer also to be in scientific notation.
the multiplication of the 10's, using the exponents rule is :
the multiplication of the other 2 numbers is:
(we write the number so that it has only one digit to the left of the decimal point).
Thus,
Answer:
So for this, we will have to find the zeros (x-intercepts) of the equation. In this case, we will be using the quadratic formula, which is (a = x^2 coefficient, b = x coefficient, c = constant). Using our info, our equation is such:
Firstly, solve the multiplications and the exponents:
Next, do the addition:
Next, plug in the equations into the calculator and your answer will be:
Since we can't have negative time in this situation, it can't be -0.41 seconds. Which means that the object is visible for about 0.60 seconds, or C.