Which expressions are equivalent to 1/5 • 1/5 • 1/5 • 1/5

1/625

Step-by-step explanation:

The dots between the fractions mean multiply. Multiply all the numerators together, then all the denominators.

     1x1x1x1 = 1

5×5×5×5 = 625

If you put it in a calculator, you get 0.0016

or as an exponential expression  or  

Negative exponents mean "the reciprocal of the base to the power"

in this case, 5^4 is and that's 625. the reciprocal is 1/625.

answer

explanation

the area of a circle is calculated using the formula

or

we can use any of the above formulae to calculate the required. preferably, let us use the latter since the diameter is

we substitute the diameter into the formula to get:

this is the exact value for the area of the circle.

the correct answer is a

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