A= pi times r*r so if you are using 3.14 as pi the answer is 78.5 because 5x5=25
25x3.14=78.5
Answer:
2. tan 280°
3. -tan 80°
Step-by-step explanation:
Your calculator can help you figure this out.
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The tangent function is periodic with a period of 180°, so tan(100°) will be equal to tan(100°+k·180°) for any integer k. Answer choices include k values of ±1, so two of them are correct:
- tan(100°) = tan(100° -180°) = tan(-80°)
- tan(100°) = tan(100° +180°) = tan(280°)
Answer:
23/20 or 1 and 3/20
Step-by-step explanation:
Make sure they have the same common denominator. For 5 and 4, 20 would be the Least Common Denominator.
so 2/5=8/20 and 3/4=15/20
Add 8+15 and you get 23 so 23/20 you can leave it so or switch it to a mixed number 1 3/20
