Answer:
- 1/2
Step-by-step explanation:
(-4/5) × (- 5/8)
- 4/5 × - 5/8
First we mulitply across
The top and the bottom.
- 20 / 40
because -4 × -5 = +20
and -5 × -8 = +40
Now we simplify the fraction
- 20 / 40
= - 2 /4
= - 1/2
Because we have to simplify it and so I divided it by 10 first.
-20 ÷ 10 = -2 and -40 ÷ 10 = -4
Then I simplified it again by dividing it by 2.
-2 ÷ 2 = -1 and -4 ÷ 2 = -2
So finally we have:
-1/2
And we cannot simplify that anymore so that is the answer.
Hope that helped!
Answer:
the actual answer is 16cm, so probably answer d?
Step-by-step explanation:
Answer:
228cm^2
Step-by-step explanation:
Formulas we'll use: area of a rectangle is length x width, and area of a triangle = 1/2x base x height
the base is a rectangle, 10 by 3 cm. 10 x 3 = 30cm^2
the sides are also rectangles, 13 by 3 cm. 13 x 3 = 39, but there are 2 of them, 39 x 2 = 78cm^2
The top and bottom are triangles, 1/2(10)(12) = 1/2(120) = 60, but there are 2 of them, 60 x 2 = 120cm^2
Add up the areas to get your total surface area. It's in square cm
30 + 78 + 120 = 228cm^2
Answer:
![720\pi](https://tex.z-dn.net/?f=720%5Cpi)
Step-by-step explanation:
Translating to English:
A cylinder has a volume that is 25% greater than a sphere with a surface area of
. What is the cylinder's volume?
<u>Solution:</u>
This isn't a hard question. You do not need to get inside the nitty gritty of the formula for volumes and surface areas. The SA of sphere is given and we are told the VOLUME of CYLINDER is 25% GREATER THAN THIS!
So, we just need to figure out what is 25% greater than ![576\pi](https://tex.z-dn.net/?f=576%5Cpi)
Lets keep the
as constant and find 25% greater than 576 and we tag along the
.
We need to find 25% of 576 and add it to 576 to get our answer.
25% = 25/100 = 0.25
So,
0.25*576 = 144
So,
144 + 576 = 720
The answer would be ![720\pi](https://tex.z-dn.net/?f=720%5Cpi)
The 2nd answer choice (with a typo here), is correct.