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Vlad1618 [11]
3 years ago
8

Can someone help me with with my home work i have 45 questions

Mathematics
2 answers:
Shalnov [3]3 years ago
3 0
The answer on the picture is right
DedPeter [7]3 years ago
3 0
You’re right it’s c.
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1/2 x 2 1/2 as a fraction in simplest form plz help fast
Naily [24]
5/4. first, convert the mixed fraction into an improper fraction to get 5/2. multiply the 5/2 to the 1/2. multiplying the numerators gets you 5. the denominators being multiplied gets you 4. 5 is the new numerator, 4 is the new denominator. 5/4 is in simplest form
7 0
2 years ago
I need help finding both volume and surface area
Svetradugi [14.3K]

Answer:

<u>Volume</u>

For the rectangle, h = 3cm, l = 8cm, w = 6cm
V = length x width x height
V = 8cm x 6cm x 3cm
V = 144cm^3

For the semi circle, we need to find the radius. The radius is width/2, so 6cm/2 = 3cm. r = 3cm, \pi = 3.14
V = radius^2 x height x \pi
V = 3cm^2 x 3cm x 3.14
V = 84.8 cm^3/2 (because the cylinder needs to be divided to form a semi-circle)
V= 42.4cm^3 (there are two cylinders though so we will multiply this by 2 in the total volume)

Total volume:
V = 144cm^3 + 42.4cm^3(2)
V = 186.4cm^3

<u>Surface Area</u>

Rectangular prism:
A = 2[w(l) + h(l) + h(w)]
A = 2[6cm(8cm) + 3cm(8cm) + 3cm(6cm)]
A = 180cm^2
But there are two sides that are covered by the semi-circular prisms, so we will have to calculate those sides and remove them.
A = l x w
A = 6cm x 3cm
A = 18cm^2(2) (2 being the two faces)
A = 36cm^2

A = 180cm^2 - 36cm^2
A = 144cm^2 (the area of the rectangle)

Semi-circular prism:
A = 2\pirh + 2\pir^2
Earlier, we found out that the radius of the circle is 3cm, so we will plug that in.
A = 2(3.14)(3cm)(3cm) + 2(3.14)(3cm)^2
A = 113.09cm^2

Total surface area:
A = 144cm^2 + 133.09cm^2
A = 277.09cm^2

Therefore the total volume of the prism is 186.4cm^3 and the total surface area is 277.09cm^2.





6 0
1 year ago
What postulate or theorem proves the two triangles are similar?
11111nata11111 [884]

Answer:

sss therom

Step-by-step explanation:

they are congruent on all sides

8 0
3 years ago
Can someone solve Pythagorean theorem​
Ad libitum [116K]

Answer:

48 units

b= 48 units

Step-by-step explanation:

pythag is a^2+b^2=c^2

we have a and c

so substitute them in

14^2+b^2=50^2

now you can solve

196+b^2=2500

subtract 196 from both sides

b^2=2500-196

subtract

2500 - 196 = 2304

b^2=2304

solve for the square root

square root of 2304= 48

therefore b= 48 units

5 0
2 years ago
Plz help me plz f(89) = -481.4 and f(126) = -677.5
yaroslaw [1]

Answer:do u have the answer

Step-by-step explanation:

4 0
3 years ago
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