sert commas in the correct positions for the number 3790241068. A. 3,790,241,068 B. 37,902,410,68 C. 37,90,24,10,68 D. 379,024,1
amm1812
The answer to your question is A. 3,790,241,068
Answer:
B
Step-by-step explanation:
Reflection is a transformation that preserves lengths.
Triangle XYZ, with side lengths XY = 7 in, YZ = 5 in, XZ = 4 in, is reflected across the x-axis to result in △X'Y'Z'.
This means that corresponding sides have the same lengths:
- XY = X'Y' = 7 in;
- XZ = X'Z' = 4 in;
- YZ = Y'Z' = 5 in.
Find the perimeters of both triangles:
Hence, only option B is true.
Remark
2015 is an odd numbered year. It is not a leap year. It has 365 days in it.
Equation
Total deaths = deaths / day * number of days
Givens
Total deaths = 32800
deaths / day = ???
number of days = 365
Sub and solve
32800 = x * 365 Divide by sides by 365
32800 / 365 = x
x = 89.86 deaths per day.
Problem
Do you round up, down or leave the number as it is?
I would round up 90 deaths per day.
Discussion
Just how much are you out?
Total deaths in a year (rounded) = 90 * 365
Total deaths in a year (rounded)= 32850 which is 50 too many
Suppose you round down
Total death/day = 89 * 365 = 39485 Rounding up is going to be better if you round at all.
Perhaps you should not round the answer at all and leave it at
89.86 <<<<< answer.
If you have choices, please list them.
the answer to your question is B.) 12x
Answer:
789 m²
Step-by-step explanation:
Consider the cross section created by a vertical plane through the apex of the pyramid and bisecting opposite sides. The cross section is an isosceles triangle with base 20 m and height 17 m. One side of this triangle is the slant height of the face of the pyramid.
The side of the triangle above can be found using the Pythagorean theorem. A median from the apex of the triangle will divide it into two right triangles, each with a base of 10 m and a height of 17 m. Then the hypotenuse is ...
s² = (10 m)² +(17 m)² = 389 m²
s = √389 m ≈ 19.723 m . . . . . slant height of one triangular face
__
The area of one triangular face is ...
A = (1/2)sb
where s is the slant height above, and b is the 20 m base of the face of the pyramid. There are 4 of these faces, so the total area is ...
total lateral area = 4A = 4(1/2)sb = 2sb = 2(19.723 m)(20 m)
total lateral area ≈ 789 m²
