madelyncross24
24.05.2020 •
Mathematics
An observer measures the angle from the ground to the top of a building from two different locations. The measurement are shown in the diagram. What is angle A? In degrees
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Ответ:
1937
Step-by-step explanation:
Let the digits of the number = xyzw
(a) 1st clue
Prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37,…
The twelfth prime number is 37, and normal body temperature is 37 °C.
zw = 37
z = 3
w = 7
(b) 2nd Clue
z = ⅓y Multiply each side by 3
y = 3z
= 3 × 3
= 9
(c) 3rd clue
An icosahedron has 20 triangular faces.
x + y + z + w = 20
x + 9 + 3 +7 = 20
x + 19 = 20
x = 1
x = 1; y = 9; z = 3; w = 7
xyzw = 1937