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PolarNik [594]
2 years ago
15

I don't know how to solve surface area

Mathematics
1 answer:
Viefleur [7K]2 years ago
5 0
Find the area of each face of the figure. So, find the area of one of the triangular faces and multiply it by 2 because there are 2 of them. Then find the area of the front rectangle, the back rectangle, and the bottom rectangle. Add all of these areas up to get the surface area.
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Mhanifa please help this is due soon
kvv77 [185]

Answer:

<u>Use Pythagorean theorem:</u>

  • a² + b² = c²

#7

  • 3² + 7² = 9 + 49 = 58
  • (√57)² = 57
  • 58 ≠ 57
  • No

#8

  • 11² + 2² = 121 + 4 = 125
  • (5√5)² = 25*5 = 125
  • 125 = 125
  • Yes
3 0
2 years ago
Write each phrase as an algebraic expression ​
Alekssandra [29.7K]
1. 15-x
2. 4y
These are algebraic expressions for both.
7 0
3 years ago
The radius is 6 and the height is 15 what is the volume in terms of pi the shape is a cone
Alenkinab [10]

Answer:

565.49 or if rounded to the nearest tenth, 565.5

Explanation:

The formula for finding the volume of a cone is V=1/3Bh

B = pi times the radius squared

h = height

Substitute 6 for r and 15 for h.

V= 1/3·\pi·(6^{2})·15

Multiply.

V= 565.49 or 565.5 rounded to the nearest tenth.

4 0
2 years ago
Can you find the marginal profit of a,b and c?
MakcuM [25]
Keeping in mind that for a cost C(x) and profit P(x) and revenue R(x), the marginal cost, marginal profit and marginal revenue are respectively dC/dx, dP/dx and dR/dx, then

\bf P(x)=0.03x^2-3x+3x^{0.8}-4400&#10;\\\\\\&#10;\stackrel{marginal~profit}{\cfrac{dP}{dx}}=0.06x-3+2.4x^{-0.2}&#10;\\\\\\&#10;\cfrac{dP}{dx}=0.06x-3+2.4\cdot \cfrac{1}{x^{0.2}}\implies \cfrac{dP}{dx}=0.06x-3+2.4\cdot \cfrac{1}{x^{\frac{1}{5}}}&#10;\\\\\\&#10;\cfrac{dP}{dx}=0.06x-3+\cfrac{2.4}{\sqrt[5]{x}}

\bf a)\qquad &#10;\cfrac{dP}{dx}=0.06(200)-3+ \cfrac{2.4}{\sqrt[5]{200}}&#10;\\\\\\&#10;b)\qquad \cfrac{dP}{dx}=0.06(2000)-3+\cfrac{2.4}{\sqrt[5]{2000}}&#10;\\\\\\&#10;c)\qquad \cfrac{dP}{dx}=0.06(5000)-3+\cfrac{2.4}{\sqrt[5]{5000}}&#10;\\\\\\&#10;d)\qquad \cfrac{dP}{dx}=0.06(10000)-3+\cfrac{2.4}{\sqrt[5]{10000}}
3 0
2 years ago
The smiths holiday tickets cost £352 including 10% flight tax. How much were the tickets before the flight task
Zepler [3.9K]

Answer:

£320

Step-by-step explanation:

Using proportion,

If 110% =  £352

100% = ?

= \frac{100}{110} * 352

= £320

5 0
2 years ago
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