Answer:
A mean in math is when you have a set of numbers, you add up all numbers of the set and then divide that sum by the total amount of numbers.
Example: 3,6,8,9
3+6+8+9=26
26/4 (because there is four numbers)
26/4= 6.5
So the mean of that set will be 6.5
Step-by-step explanation:
Hello there. To solve this question, we need to remember some properties on powers.
(-25)^(-4) * (5^(-3))^(-2)
To start, remember a^(-n) = 1/a^n, for a not equal to 0. Also, (ab)^n = a^n * b^n and (a^b)^c = a^(b*c)
Such that we have:
(-1)^(-4) * 25^(-4) * 5^((-3)*(-2))
1/(-1)^4 * (5^2)^(-4) * 5^6
Since (-1)^4 is equal to 1, we get:
5^(2*(-4)) * 5^6
5^(-8) * 5^6
Knowing that a^b * a^c = a^(b + c), we get:
5^(-8+6)
5^(-2)
Applying the first rule, we get:
1/5^2
1/25.
Answer:
Step-by-step explanation:
Diagram attached
Answer:
5.5+106 square inches
Step-by-step explanation:
The wooden frame has different shapes- semi circle, rectangles and we would have to calculate area of all the shapes to get the wood required.
To get area of the circle, we use the formula π(R²-r²)/2. Subtract the inner radius from the outer radius =
π(6²-5²)/2= 11π/2
=5.5π square inches
We add area of the semi circle to area of the 3 rectangles from the diagram:
2×1×48×10×1=106 square inches
The rectangle with 10 inches is because we subtracted one inch from both sides of the 12 inches rectangle to avoid repetition and overvaluing the area
Total area =5.5π +106 square inches
Options must have ommitted the "π"