Can someone answer this? 0.9×0.90.09×0.90.009×0.90.009×0.09

we know that 9*9 = 81, so let's start there.

0.9 * 0.9

one amount has 1 decimal, the second amount has another decimal, so in the product, we must have two decimals, let's do the multiplication without the dot.

09 * 09 = 81

but we must have two decimals, so that becomes 0.81.

0.09 * 0.9

here we do the same, the multiplication without the dot, and then we add as many decimals, in this case is 3 decimals, first term has 2 and the second term has 1 decimal, so the product must have 3 decimals.

009 * 09 = 81

getting those 3 decimals  0.081.

0.009 * 0.9

here we do the same

0009 * 09 = 81

the product needs 4 decimals, so 0.0081.

0.009 * 0.09

we do the same here

0009 * 009 = 81

since the product needs 5 decimals  0.00081.

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function