Increase or decrease 32 pages to 28 Pages round to the nearest tenth of a percent

1 answer:

6 0

Hello! I would love to help!

Let's start by decreasing 32 pages to 28. How many pages does it take to get from 28 to 32? Let's subtract to find out!

32-28=4

Okay, now we know 28 pages is 4 less than 32.

Now, what percentage did it decrease by? Let's find out by dividing!

4/32=0.125

Let's make that decimal into a percentage by multiplying it by 100.

0.125*100=12.5

So, we now know the answer is...

decreased by 12.5%

Hope this helped! Comment if you have questions!

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Pyramid A has height 5 1/2, and Pyramid B has height 2 3/4. A and B are similar. What is the ratio of their:

N76 [4]

Answer:

Lateral areas have ratio of 4:1

Volumes have ratio of 8:1

Step-by-step explanation:

There is a rule in 3D geometry that when two solids are similar, and their edges are in the ratio of $a:b$ , the ratio of any surface area type measure is always $a^2:b^2$ this includes the lateral area, which is just a surface area minus the base, which is not important for this problem. The ratio of volumes of those similar solids is in the ratio of $a^3:b^3\\$ .

Now, to solve this, we need to find the ratio of any corresponding length of these similar pyramids. We have both the heights, so if we form a ratio of $\frac{5\frac{1}{2} }{2\frac{3}{4} }$ which if you simplify it, it is $\frac{5.5}{2.75}$ , which is $2$ . The ratio of the heights are $2:1$ .

Now we can apply those rules to this ratio, the ratio of lateral areas would then be $2^2:1^2$ , which is $4:1$ . the ratio of volumes would be $2^3:1^3$ , which is $8:1$