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Anna [14]
3 years ago
7

The sum of its digits is a cube

Mathematics
1 answer:
liubo4ka [24]3 years ago
5 0
May you ask the question please again?
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The angle of elevation from a point on the ground to the top of a pyramid is 31 degrees 10​' The angle of elevation from a point
mart [117]

Answer:

h ≈ 209 ft

Step-by-step explanation:

The illustration forms 2 right angle triangle with same height , which is the height of the pyramid.

The first triangle has an unknown adjacent side and height but the angle is 31° 10'. The larger triangle has adjacent side of 120 ft plus the adjacent side of the smaller triangle.

let

the adjacent side of the smaller triangle = a

recall both triangle have same height = h

Therefore,

tan 31° 10' = opposite/adjacent = h/a

tan 31.167 = h/a

h = a tan 31.167

h = 0.6048345941  a

The larger triangle

adjacent side = 120 + a

height = h

tan 24° 10' = h/120 + a

convert the minutes to degree

tan 24.167° = h/120 + a

cross multiply

120 + a tan 24.167 = h

120 + a (0.44872570999 ) = h

h = 53.8470851998  + 0.44872570999a

Therefore,

0.6048345941  a  = 53.8470851998  + 0.44872570999a

0.6048345941  a  - 0.44872570999a = 53.8470851998

0.1561094942 a = 53.8470851998

divide both sides by 0.1561094942

a = 53.8470851998 / 0.1561094942

a = 344.931520506

a ≈ 345 ft

The height can be computed as

tan 31.167 = h/a

h = 345 × tan 31.167

h = 345 × 0.6048345941

h = 208.667934967

h ≈ 209 ft

6 0
4 years ago
Use Completing the square to solve: –3x^2 + 12x – 15 = 0
Reptile [31]

Answer:

x = 5

x = -1

Step-by-step explanation:

4 0
3 years ago
Cuánto es 9.5 × 4/3 ???​
kenny6666 [7]

Answer:

(9.5)(4) /3

=  38 /3

(Decimal: 12.666667)

 Espero que ayude!!

4 0
3 years ago
WILL GIVE EXTRA POINTS<br>Assignment name: identify angles​
lana [24]

Answer:6,2,3 are all acute

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
CORRECT ANSWER GETS A BRAINLIEST
Alex787 [66]

Answer:

B.   N(c)  = (c-20)/n  

Step-by-step explanation:

Given

C(n) = 10n+20

we have to find the inverse of this function

we have to express n in terms of C(n)

C(n) = 10n+20

we have make n independent of n and remove any other term containing on the side of n

subtracting 20 from LHS and RHS

C(n) - 20 = 10n+20 - 20

C(n) - 20 = 10n

dividing LHS and RHS by 10

C(n)/10 - 20/10 = 10n/10

=> n = (C(n) - 20)/10

Now given in problem, N(c) is no of bushels picked

and c is the cost of apple

so in function n = C(n) - 20/10

we replace C(n) with c

and n with  N(c)  

and then we have

N(c)  = (c-20)/n   Answer

3 0
3 years ago
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