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lys-0071 [83]
4 years ago
15

Design and implement a set of classes that define a series of three dimensional geometric shapes

Mathematics
1 answer:
frez [133]4 years ago
3 0
You have to do this ok
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How to do question 22?
Aleks04 [339]

Answer:

A = 20sinθ(6 + 5 cosθ)  cm²

Step-by-step explanation:

Drop perpendiculars DE and CF to AB.

Then, we have congruent triangles ADE and BCF, plus the rectangle CDEF.

The formula for the area of the trapezium is

A = ½(a + b)h

DE = 10sinθ

AE = 10cosθ

BF = 10cosθ

EF = CD = 12 cm

AB = AE + EF  + BF = 10cosθ + 12 + 10 cosθ = 12 + 20cosθ

A = ½(a + b)h

   = ½(12 +12 + 20 cosθ) × 10 sinθ

   =(24 + 20 cosθ) × 5 sinθ

   = 4(6 + 5cosθ) × 5sinθ

   = 20sinθ(6 + 5 cosθ)  cm²

6 0
3 years ago
You deposit $8500 in an account that pays 1.78% annual interest. Find the balance after 10 years when the interest is compounded
Feliz [49]

Step-by-step explanation:

step 1. let's call the balance A, the initial amount P, the yearly rate r, the number of compounds yearly n, and the time t.

step 2. A = P(1 + r/n)^(nt) (compounding equation)

step 3. A = 8500(1 + .0178/12)^((12)(10))

step 4. A = 8500(1.00148334)^120

step 5. A = $10,154.68.

8 0
3 years ago
Read 2 more answers
PLEASE help ASAP PLEASE
AnnyKZ [126]

Answer: 153

Step-by-step explanation:

A straight line is a 180 degree angle.

If you subtract 38 from 180, you get your answer.

180 - 36 = 153

7 0
3 years ago
Aaron borrows $150 from his friend Austin. He has to pay the money back in 4 monthly installments. Each month he wants to pay ha
Y_Kistochka [10]
Austin should pay $75 the first month, and 37.50 for the remaining of the 2 months
5 0
3 years ago
At a party the ratio of males to females is 5:3.
vredina [299]

Answer:

9 females

Step-by-step explanation:

Original ratio is 5:3 meaning to get 15 males you need to multiply by 3

which gives you 15 males.

Now do the same for females and multiply by 3 giving you your answer

9!

3 0
3 years ago
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