Choice 4 is correct ... r = the square root of area over pi
There were 74 problems in the test.
<h2>Rounding-off percentage</h2>
Let the student got total number of problems in the test to be X.
Percentage of correct answer = 39 %
⇒ 61% of X were incorrect
⇒61/100 x X = 45
⇒61X = 45x100
⇒X = 4500/61
⇒X=73.77
After rounding off 73.77, we get 74.
Hence, we can say that there were total of 74 problems in the test.
Learn more about percentage rounding-off on:
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Answer:
False
Step-by-step explanation:
Answer:
Step-by-step explanation:
Four triangles. Each area is bh/2.
So 8x ÷2 or 4x Multiply by 4 (small triangles) to get 16x.
48 ÷ 16 =3 so x = 3
