The decimal number for seventy eight hundred-thousandths is 5.
<h3>
What is decimal number?</h3>
A decimal is a number that consists of a whole and a fractional part
The decimal numeral system is the standard system for denoting integer and non-integer numbers.
What is the decimal number for seventy eight hundred-thousandths?
= 78 x 10⁻⁵
<u>note</u>: a hundred thousandth = 10⁻⁵
= 0.00078
Thus, the decimal number for seventy eight hundred-thousandths is 5.
Learn more about decimal number here: brainly.com/question/1827193
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107........,...............
Based on the dimensions of the wall and the triangular glass, the number of mirrors needed is 215 mirrors.
<h3>What number of mirrors are needed?</h3>
First find the area of the wall:
= 36 x 93
= 3,348 m²
The area of the triangle, assuming it is an equilateral triangle is:
= (√3/4) x 6²
= 15.59 m²
The number of mirrors needed is:
= 3,348 / 15.59
= 215 mirrors
Find out more on the area of an equilateral triangle at brainly.com/question/1099318.
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So basically you just need to do the Pythagorean theorem to find the sides of the shaded rectangle, with c being the length of the side.
Small side:
2^2 + 6^2 = c^2
4 + 36 = c^2
40 = c^2
C is similar to 6.32456
Long side:
12^2 + 4^2 = c^2
144 + 16 = c^2
160=c^2
C is similar to 12.64911
And then you just multiply!
