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seraphim [82]
3 years ago
12

Help with these questions, please!!

Mathematics
2 answers:
ivann1987 [24]3 years ago
8 0
Your rhombus is 1,960
shepuryov [24]3 years ago
6 0

Answer:

A = 94.5x cm^2

Step-by-step explanation:

To find the area of a trapezoid you have to use this equation.

A = a+b/2*h

Now plug in the numbers

12x + 15x /2*7

27x/2*7

13.5*7

94.5

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Maria want to make a footstool in the shape of a cylinder, as show below. She wants to fill the footstool with foam and cover it
noname [10]

Answer:

She'll need 8143 cubic inches of foam and 1,809.6  square inches of fabric.

Step-by-step explanation:

Assuming you want to know how much foam and fabric she will need...

First the foam... so we need to determine the volume of that footstool.  The Volume of a cylinder is given by:

V = π * r² * h

So, we plug in the numbers:

V = π * 12² * 18 = π * 144 * 18

V = 2,592 π  = 8143 cubic inches.

Now for the fabric... we'll assume Maria wants to cover the side of the stool and the top, but not the bottom.

The side of the stool is basically a rectangle of width of 18 inches and a length of the circumference of the base of the stool.  The circumference is given by: C = 2 π * r of course, so C = 24π = 75.14 inches.

So the lateral surface of the cylinder is:

LS = 18 * 75.14 = 1,357.2 sq inches.

Then we need to calculate the area of the top... which is easy:

A = π * r²  = π * 12²  = 144 π = 452.4 sq inches

So, to cover the lateral side of the footstool and its top, she needs to use:

TA = 1,357.2 + 452.4 = 1,809.6 sq inches of fabric.

5 0
3 years ago
Read 2 more answers
V=1/3πr2h solve for r
Marat540 [252]
See photo for worked out solution.
Hope this helps!

3 0
3 years ago
Can Someone help me?
olchik [2.2K]
First question
1:C 2:D 3:B 4:D

second question
0-2+5

6 0
3 years ago
Read 2 more answers
The regular price of some patio furniture is $230.00. Today, the patio furniture is on sale for 10% off. What is the amount of t
inn [45]
10% * $230.00 = $23.00

The discount is $23.00.

_____
Of course, you know that 10% expressed as a decimal is 0.10. Many calculators will calculate percentages directly. If yours doesn't, you can use the decimal equivalent. If you recognize that multiplying by 1/10 simply shifts the decimal point to the left one place, you can do the arithmetic in your head.
4 0
3 years ago
Look at pseudocode segment below. y ← x + x + x + x + x // line a z ← y + y + y // line b If x = 6 before this segment is execut
r-ruslan [8.4K]

Answer:

90.

Step-by-step explanation:

We have two lines of code:

y ← x + x + x + x + x

z ← y + y + y

and, x=6 before the execution. Then, when the program starts to run we obtain:

y ← 6 + 6 + 6 + 6 + 6

y ← 30

z ← 30+30+30

z ← 90.

Then, the value of z after excecution is 90.

6 0
3 years ago
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