Which of the following is a function? A. (-4,5) (3,-3) (4,1) (9,2) B. (-4,3) (3,2) (-4,-5) (9,0)
2 answers:
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The number of questions in the test is 30
Step-by-step explanation:
Let's call the total number of questions in the test N.
We know that Laura answered 27 questions, and these 27 questions represent the 90% of the test.
Therefore, we can say that 27 is the 90% of N.
Re-writing the percentage as a fraction,
This means that:
And now we can solve for N to find the number of questions in the test:
Learn more about percentage:
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Answer:
The total surface area is 896
Step-by-step explanation:
<em>The square pyramid is a solid with square base and symmetric 4 triangular faces.</em>
Given that the square base is 14 m and height is 24 m.
The apex of pyramid, center of square and center of any edge of square make a right angled triangle.
Let that height if triangular face be "x".
by pythagoras theorm ,
x = 25 m
the area of square base is
the area of each triangular side is <em></em>
such are 4 triangles, thus
Thus the total surface area is 196 + 700 = 896
