From the graph, see where the two lines cross. That is the correct answer. The answer is (4,-3.4)
Answer:
Step-by-step explanation:
Using soh cah toa
Sin=opp/hot
Sin 52°=h/121
h=sin52°×121
h=0.7880×121feet
h=95.348feet
22.8 grams of element will be remaining after 7 minutes
Further explanation:
Given
![Mass\ of\ element=130g\\Percentage\ of\ reduction=22\%](https://tex.z-dn.net/?f=Mass%5C%20of%5C%20element%3D130g%5C%5CPercentage%5C%20of%5C%20reduction%3D22%5C%25)
The element reduces (1-22%) in one minute.
The process will be repeated 7 times for 7 minutes
If we have to calculate the amount of element after 7 minutes
then the total reduction will be: (1-22%)^7
![Remaining\ amount=130*(1-22\%)^7\\=130*(1-0.22)^7\\=130*(0.78)^7\\=130*0.18\\=22.84g\\Rounding\ off\ to\ nearest\ tenth\\=22.8g](https://tex.z-dn.net/?f=Remaining%5C%20amount%3D130%2A%281-22%5C%25%29%5E7%5C%5C%3D130%2A%281-0.22%29%5E7%5C%5C%3D130%2A%280.78%29%5E7%5C%5C%3D130%2A0.18%5C%5C%3D22.84g%5C%5CRounding%5C%20off%5C%20to%5C%20nearest%5C%20tenth%5C%5C%3D22.8g)
22.8 grams of element will be remaining after 7 minutes
Keywords: Decay, Percentage
Learn more about percentage at:
#LearnwithBrainly
Answer:
B
Step-by-step explanation:
...
-23 over 5 ÷ 11 over 5
-23 × 5 over 5 × 5
-115 over 55
Therefore, your answer would be: -2 and 1 over 11